"The pyriform sinus is a sort of pocket that goes alongside your voice box, and there's no muscle there to reinforce it, so it's basically just a loose mucus membrane," Portnoy says.
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But first, a brief recap: A BMJ case report published Monday details an unusual medical case in which a British man suffered a "rare spontaneous perforation of the pyriform sinus" after pinching his nose and closing his mouth to suppress a sneeze.
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Along with the parahippocampal gyrus, the pyriform cortex is a chief component of paleocortex. The pyriform cortex is located in the anterior medial temporal lobe. Through the amygdalofugal pathway, it projects to the nucleus of the diagonal band. The pyriform cortex is adjoined to the basolateral nucleus of the amygdala.
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Inside are wrinkled dark brown globular seeds, which are pyriform.
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Inside the capsule, are maroon-brown seeds which are pyriform (pear shaped).
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The pyriform cortex and the basolateral nucleus are considered to be the main starting points of the amygdalofugal pathway. The connection from the basolateral nucleus that goes deep to the pyriform cortex is also considered part of the amygdalofugal pathway.
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The genus Pyricularia is named after the pyriform (pear-shaped) shape of its conidia.
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Inside are pyriform (pear shaped), brown seeds. They are rugulose and have a white aril (appendage).
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Inside, are multiple, black- brown seeds, which are pyriform (pear shaped) and have a small cream (coloured) aril (appendage).
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The pyriform shape makes the egg inherently more stable, especially on the sloping surfaces on which guillemots commonly breed.
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Inside, are pyriform (pear shaped), paper- like seeds, with a glossy or wrinkled (rugose), yellowish maroon, seed coat (or testa).
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On either side of the laryngeal orifice in humans is a recess, termed the pyriform sinus (also piriform recess, piriform sinus, piriform fossa, or smuggler's fossa), which is bounded medially by the aryepiglottic fold, laterally by the thyroid cartilage and thyrohyoid membrane. The fossae are involved in speech. The term "pyriform," which means "pear-shaped," is also sometimes spelled "piriform". Deep to the mucous membrane of the pyriform fossa lie the recurrent laryngeal nerve as well as the internal laryngeal nerve, a branch of the superior laryngeal nerve.
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The aperture is pyriform. The sinus is U-shaped and rather deep. Hedley, C. 1922. A revision of the Australian Turridae.
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The light, pyriform shell is ventricose, ribbed, and cancellated. The spire very short. The aperture large. The smooth columella is simple.
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The aperture is pyriform. The outer lip is simple. The notch on the shoulder is rather deeply incised. Hedley, C. 1922.
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Microconidia are spherical, pyriform to clavate or of irregular shape, and range from 2 to 3 by 2 to 4 μm in size.
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It splits (or dehisces), below the beak. Inside the capsule are pyriform (pear) shaped seeds, that are red with a yellowish aril (appendage).
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Then fabelliform budding of mostly eight sporoblasts into the vesicle is initiated. Initially the wall of the encysted spore (sporont) has two layers. During the maturating of the sporont two generations of tubules are present in the episporontal space, being reduced at maturity. Mature spores of the genus Hamiltosporidium are polymorph, though pyriform and elongated rod-like spores dominate in H. tvaerminnensis while H. magnivora has lightly pyriform spores only. Pyriform spores measure 4·9–5·6 x 2·2–2·3 μm while elongated spores measure 6·8–12·0 x 1·6–2·1 μm in H. tvaerminnensis.
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Same as pustulate. Pyramidal. Having the form of a pyramid. Pyriform. Shaped like a pear. Reflected. Bent backward, as the lip in some snails. Reflexed.
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The capsules dehisce (split open), laterally (similar to Iris korolkowii). Inside the capsules, are brown, ovoid, globose or pyriform seeds. which have a circular aril.
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The initially green or glaucous epimatium becomes red at maturity and varies from subglobose to ovoid-pyriform in shape with a length of 18-25 millimeters.
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Slit sutural, broad and deep. The aperture is pyriform, narrowing gradually to the siphonal canal. The outer lip is sharp. There is no callus on the columella.
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After the iris has flowered, it produces an oblong or trigonal seed capsule, that is long. Inside the capsule, are large, pyriform (pear-shaped), brown wrinkled seeds.
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Occasional growth striae cross the shell obliquely. The aperture is pyriform. The columella is excavate. The outer lip is grooved within and bevelled to a sharp edge.
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The entire surface of the shell is marked by fine, regular, close, spiral striations. The aperture is pyriform. The posterior angle is acute. The outer lip is thin.
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Unlike other iris species. The seeds are pyriform (pear-shaped) and have an aril (white appendage on the edge of the seed). The aril disappears soon after and shrivels up.
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The flowers are small and yellow, 2 mm to 4 mm across. Fruit is shiny purple black, ellipsoid, pyriform, or obovoid, 11–19 mm long and 8–10 mm in diameter.
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The pyriform cortex is a type of allocortex that corresponds to the rostral half of the uncus. Its strongest afferent connections are from the olfactory bulb. Although the olfactory cortex comprises all the “areas in the rostro-ventral portion of the forebrain which receive direct projections from the olfactory bulb,” including the anterior olfactory nucleus, olfactory tubercle, the pyriform cortex, the entorhinal cortex, the insular cortex, and the amygdala, the pyriform cortex is considered synonymous with the olfactory cortex because it is “by far the largest cortical area primarily involved in perception and learning of olfactory stimuli.” It is a type of paleocortex, which means that it older than and has fewer layers than neocortex but is more recent than and contains more layers than archicortex.
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The piriform cortex, or pyriform cortex, is a region in the brain, part of the rhinencephalon situated in the cerebrum. The function of the piriform cortex relates to the sense of smell.
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The anterior portion of the base shows about seven ill-defined spiral lirations. The aperture is narrowly elongate pyriform. The sinus is shallow immediately below the sutures. The outer lip is somewhat sinuous.
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The aperture is irregularly pyriform, and effuse anteriorly. The posterior angle is acute. The outer lip is thin, showing the external sculpture within. The columella is moderately stout, reflected, reinforced by the base.
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The sutures are simple and well marked. The periphery and the base of the body whorl is well rounded, the latter somewhat elongated. The umbilicus is faint. The pyriform aperture is quite large.
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The parasite is intra erythrocytic, ameboid, oval or pyriform in shape. There are no vacuoles or reticulation in the cytoplasm. The nucleus has two or more chromatin granules. The parasite has a single membrane.
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Lightly pyriform spores in H. magnivora measure 2.34-3.03 x 4.07-4.93 μm. The polar filaments in the mature spore are more or less isofilar and the polaroplast has 2 – 3 distinct lamellar regions.
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Sporangiosphores are unbranched, smooth- walled, and light brown. Sporangia are apophyseal, pyriform, beginning as whitish and turning brown with maturity. Sporangiospores are variable in size and shape. Sexuality has not been observed in A. variabilis.
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After the iris has flowered, it produces a seed capsule, in mid June, inside the capsule are brown, wrinkled, pyriform (pear shaped) to oval shaped seeds, which are later dispersed by animals or the wind.
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The bark is grey-brown. The flowers are pale yellow to white. The fruits are round to pyriform, orange-red, up to in diameter. The tree is named for Mount Kinabalu in Malaysia's Sabah state.
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Silk fibre is a two-compound pyriform secretion, spun into patterns (called "attachment discs") that are employed to adhere silk threads to various surfaces using a minimum of silk substrate. The pyriform threads polymerise under ambient conditions, become functional immediately, and are usable indefinitely, remaining biodegradable, versatile and compatible with numerous other materials in the environment. The adhesive and durability properties of the attachment disc are controlled by functions within the spinnerets. Some adhesive properties of the silk resemble glue, consisting of microfibrils and lipid enclosures.
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The channels which separate the cords are marked by numerous fine axial riblets. The aperture is irregularly pyriform, and somewhat effuse anteriorly. The posterior angle is obtuse. The outer lip is thin, showing the external sculpture within.
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Protopulvinaria pyriformis, commonly known as the pyriform scale, is a species of soft scale insect in the family Coccidae. It is a pest of avocado and is found in many countries around the world where avocados grow.
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The aperture is pyriform, somewhat effuse anteriorly. The posterior angle is acute. The outer lip is thin, showing the external sculpture within. The columella is slender, curved, and reflected, provided with an oblique fold at its insertion.
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The aperture is pyriform, somewhat effuse anteriorly. The posterior angle is acute. The columella is short, curved, reinforced by the attenuated base, free only at its extreme anterior end. It has an oblique fold near its insertion.
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The glossy protoconch contains 1 whorl. The teleoconch consists of 5 convex whorls, tabulated and with the base contracted. The aperture pyriform, with a short narrow and straight siphonal canal below. The outer lip is broken off.
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The aperture is irregularly pyriform. The posterior angle is acute. The thin outer lip is pinched in posteriorly, and shows the external sculpture within. The columella is slender, slightly reflected, and provided with a fold at its insertion.
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Shell minute, pyriform, strongly narrowed anteriorly; spire low; lip thickened, strongly denticulate; external varix probably absent (needs to be confirmed); distinct axial costae present; siphonal notch absent; columella multiplicate, with combined total of usually 8 plications plus parietal lirae.
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Conidia are solitary, pyriform to obclavate, narrowed toward tip, rounded at the base, 2-septate, hyaline to pale brown, with a distinct basal hilum, sometimes with marginal frill. Type species: Pyricularia grisea Sacc., Michelia 2(no. 6): 20. 1880.
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Aesculus turbinata, common name Japanese horse-chestnut (), is native to Japan but cultivated elsewhere. It is a tree up to 30 m tall. Flowers are white to pale yellowish with red spots. Capsules are dark brown, obovoid to pyriform.
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The word pear is probably from Germanic pera as a loanword of Vulgar Latin pira, the plural of pirum, akin to Greek apios (from Mycenaean ápisos), of Semitic origin (pirâ), meaning "fruit". The adjective pyriform or piriform means pear-shaped.
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These are slightly flattened below the sutures. The long-ovate aperture is somewhat pyriform and forms usually less than half the total length of shell. The outer lip is thin. The columella shows more or less a white shining callus.
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The fungus produces ellipsoid to pear-shaped (pyriform) or drop-shaped basidiospores that measure 5.8–7.2 by 4.3–5.5 μm. Molecular analysis of internal transcribed spacer DNA sequences indicate that L. zonatus is a unique lineage in the genus Laetiporus.
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Clutch size consists of 3–4 eggs, usually 4 that are pyriform and a pale brown with some speckled sepia colouring. Eggs measure 36 by 50 mm. The eggs are arranged in a circle, with the acute ends toward the centre.
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The pyriform glands are connected to the anterior spinnerets (90 in females and 80 in males). The aciniform glands are connected to the median (18–24 in females and 14–20 in males) and posterior spinnerets (60 in either sex).
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His long term study of the population biology of common guillemots on the island of Skomer off Wales has run since 1972, and is currently in need of support. His recent research is on the adaptive significance of egg shape in birds, including the common guillemot whose pyriform egg has long been thought to allow it to either spin-like- a-top or roll-in-an-arc to prevent it rolling off the cliff ledge. However, there is no evidence for either of these ideas. Instead, Birkhead and colleagues have identified the main advantage of a pyriform shape: stability.
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Columns' tops terminate with Corinthian capitals. At the end of the 19th century's northern nave arched vaults with two cross pyriform ribs. Ribs grow from facing pyramidal consoles. The console in the middle of the north wall is a replica circa 1914.
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After the iris has flowered, it produces an ellipsoid, seed capsule, 1.5–2.5 cm long, with 6 ridges, between May and August. Inside the capsule, are reddish brown to brown, pyriform (pear shaped) or globose seeds, which have a papery testa (coating).
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This hormonally controlled progression in development is responsible for the fruit's change of color from green to yellow upon ripening. The internal region of the flavedo is rich in multicellular bodies with spherical or pyriform shapes, which are full of essential oils.
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Section Hispidoderma consists of species with a filamentous pileipellis and thin-walled pleurocystidia. Section Celluloderma is defined by a cystoderm pileipellis composed of ellipsoid to saccate- pyriform to vesiculose cells with or without cystidioid elements. The widespread genus contains over 300 species.
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Found in laryngopharynx easilly The pyriform sinus is a subsite of the hypopharynx. This distinction is important for head and neck cancer staging and treatment.AJCC Cancer Staging Handbook: From the AJCC Cancer Staging Manual, Sixth Edition. Ed. Frederick L. Greene, M.D. page 48.
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It is leather-like, veined and has a long beak-like appendage on the top. It can carry up 20 seeds. The seeds are maroon-brown to dark brown, pyriform (pear-shaped) or elliptical, rugose (wrinkled), with a hard coating. They have a basal hilum.
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The radial ribs are seventeen to a whorl, prominent on the shoulder, and gradually vanishing towards the base, higher on the penultimate, and decreasing towards the aperture. The aperture is pyriform. The outer lip is simple. The sinus is U-shaped and rather large.
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They fill the entire lower part of the shell. The shell contains numerous, weak growth lines. The aperture is pyriform, terminating in a fairly long, open siphonal canal. The columella is at first almost perpendicular, then slightly twists towards the base, which is acuminate.
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The size of the shell varies between 20 mm and 42 mm. The turbinated shell is slightly pyriform and thin. It is everywhere grooved, the basal grooves wider and rather deep, the others irregular, very fine, waved. The color of the shell is white.
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The aperture is pyriform. The canal is short. Sculpture: The spire-whorls contain three spiral equidistant cords, which are crossed by longitudinal also equidistant threads, forming small beads at the intersections, and squarish interstitial depressions. There are about twenty- one beads on a row.
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Researchers identified four categories of silk protein types in the silk of D. triton-- aciniform, ampullate, pyriform, and tubuliform. Egg sacs contain two distinct layers, with the outer layer thought to protect eggs from water due to its unique elemental composition and hydrophobic characteristics.
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Monocercomonoides are small free-swimming, single-cell organisms ranging from 5-12μm in length, and 4.5-14.5μm in width. The body may be ovoidal, pyriform, spherical or subspherical; however, they lack holdfasts and have small axostyles.Laird, M. 1955. Intestinal Flagellates from Some New Zealand Insects.
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Asexual spores (conidia) are hyaline to brown in colour with transverse septa. The typical pyriform shape and 2-septate conidium morphology is characteristic for Pyricularia and Neopyricularia. Other genera have obclavate to more ellipsoid 2-septate conidia. Deightoniella and Macgarvieomyces evolved 1-septate conidia.
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Varying levels of CB1 expression can be detected in the olfactory bulb, cortical regions (neocortex, pyriform cortex, hippocampus, and amygdala), several parts of basal ganglia, thalamic and hypothalamic nuclei, and other subcortical regions (e.g., the septal region), cerebellar cortex, and brainstem nuclei (e.g., the periaqueductal gray).
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Pyriculariaceae is distinguished from Magnaporthaceae by their asexual morphs. Pyricularia or pyricularia-like species are characterised by pyriform 2-septate conidia and rhexolytic secession. In the case of Magnaporthaceae, morphology of phialophora- or harpophora-like species is characterised by falcate versicoloured conidia on brown, erect conidiophores.
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Inside the capsule, are pyriform seeds, which are reddish brown, which have a milky yellow or cream aril (appendage). The seed capsule grows on stems, that are about 45 cm long, above the height of the leaves. This habit is similar to Algerian Iris (Iris unguicularis).
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The hypopharynx includes the pyriform sinuses, the posterior pharyngeal wall, and the postcricoid area. Tumors of the hypopharynx frequently have an advanced stage at diagnosis, and have the most adverse prognoses of pharyngeal tumors. They tend to metastasize early due to the extensive lymphatic network around the larynx.
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The girdle is fringed with a dense series of longer spines (up to 1 mm). This species can be confounded with Acanthochitona crinita, but this last one is smaller (about 30 mm) and the granules on the dorsal plates are large, flat topped and pyriform and unevenly spaced.
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The large nuclei are about double the size of the small nuclei at about 2-4 µm diameter. Pyriform, spindle shaped or ovoid merozoites with large nuclei differentiate into spheroidal gamonts. The gamonts associate in head to head syzygy with the conoidal complexes juxtaposed. The gametocytes are hemispherical.
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Ovulinae typically have either an ovate (egg-shaped), lanceolate (lance-shaped) or pyriform (pear- shaped) shell. The spire is not prominent, and the funiculum is absent. The anal canal is twisted anteriorly. The extremities are usually short and the outer lip of the aperture has well-developed teeth.
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Magnaporthaceae are distinguished from Pyriculariaceae by their asexual morphs. For Magnaporthaceae, the morphology of phialophora- or harpophora-like species is characterised by falcate versicoloured conidia on brown, erect conidiophores. In the case of Pyriculariaceae, Pyricularia or pyricularia-like species are characterised by pyriform 2-septate conidia and rhexolytic secession.
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These are minute rounded or pyriform parasites found within erythrocytes, or other circulating or endothelial cells of vertebrates. The parasites reproduce by merogony without oocysts or spores. The apical complex has a polar ring and rhopteries. A conoid is lacking and most species lack the associated pellicular microtubules.
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The ribs are fourteen to a whorl, oblique, round-backed, commencing below the fasciole and vanishing on the base. The aperture is pyriform. The insertion of lip starts ascending above the plane of the suture, and is supported by a prominent callus knob. The inner lip shows a smear of callus.
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The base is convex, then contracted and ending in a short distally rounded beak. The suture is deep. The aperture is pyriform, broadly angled above, ending in a rather short almost straight siphonal canal, slightly turned to the left. The outer lip is imperfect, convex above, contracted near the base.
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Specifically, Piskacek's sign consists noting a palpable lateral bulge or soft prominence one of the locations where the uterine tube meets the uterus. Piskacek's sign can be noted in the seventh to eight week of gestation. Non pregnant uterus is pyriform in shape. By 12 weeks of gestation it becomes globular.
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Articulatory interpretation of the "singing formant". J Acoust Soc Am. 1974 Apr;55(4):838–844. There are several areas in or adjacent to the larynx which might resonate such a high pitch. Among them are the collar of the larynx, the ventricles of Morgani, the vallecula, and the pyriform sinuses.
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The length of the shell varies between 70 mm and 120 mm. (Original description) The solid shell is angularly pyriform and yellowish white. The spire is elevated and acuminate towards the apex. It contains 8 whorls, flattened, and slightly excavated above, strongly and prominently keeled at the periphery, and sloping inwards below.
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Fossil floras of the Smoky Tower locality, Alberta, Canada. Palaeontographica, Abteilung B, Band 157, p. 1-43. All are spirally arranged, but some are twisted at the base to lie in two horizontal ranks. The seed-bearing cones are pyriform (pear-shaped) and up to 20 mm long and 10 mm wide.
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In 1958, Gauthier-Lièvre and Thomas divided the genus into 10 groups depending on difference in shell morphology. These 10 groups are based on a survey conducted of the African species of Difflugia [3] The 10 shell shape classifications are lobed, collared, compressed, urceolate, globose, ovoid-globose, elongate, acute angled, horned and pyriform.
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It has an axial-irregular branching habit. The fruit are of a pyriform shape with weights ranging from 150 gram to 400 gram, peaking at 250 to 300 gram with an asymmetrical pedicel. The fruit are green when unripe and turn dark purple-black when ripe. The fruit skin is rough and pebbly.
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The aperture is pyriform, abruptly expanding posteriorly. The siphonal notch is placed midway between the posterior carina and the suture line, U-shaped, with parallel sides, the anterior limb more produced than the posterior. The parietal wall is thinly glazed. The anterior canal is long, very slightly curved, with proximate parallel margins.
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The aperture is pyriform, somewhat effuse anteriorly. It is channeled at the posterior angle, which is obtuse. The outer lip is thin, with a simple edge, decidedly arched in the middle, flattened on the side, showing the external sculpture within. The columella is stout, profoundly but distinctly plaited, reflected very much anteriorly.
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The fertile scale has one seed producing ovule. The single seed of the cone is covered by a modified ovuliferous scale known as the epimatium. The epimatium becomes fleshy and drupe-like at maturity. It varies in shape from elliptic to ovoid or pyriform and may be red, violet or purplish brown in color.
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The outer lip is thin. There is no umbilicus. The columellar tooth is weak and is deeply seated inside the pyriform aperture. J.J. van Aartsen, E. Gittenberger & J. Goud, Pyramidellidae (Mollusca, Gastropoda, Heterobranchia) collected during the Dutch CANCAP and MAURITANIA expeditions in the south-eastern part of the North Atlantic Ocean (part 1); CANCAP-project .
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The type species of the genus Topaginella is Marginella octoplicata Tenison Woods, 1877 †; OD (M) Remarks: The type species seems to be unique (a monotypic genus). The multiplicate columella and lack of a siphonal notch place it near Cystiscus, but the pyriform shape, exserted spire, denticulate lip, and fine axial costae render it distinct.
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After the iris has flowered, between July and September. it produces a yellow green, ellipsoid, or obovate seed capsule, which is 4 cm long and 2 cm wide, with a short beak, and yellow green with 6 ribs. Inside the capsules, are reddish brown, pyriform (pear-shaped) seeds, which are about 7 mm long.
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The anthers are cream with green-black edging and the pollen is greenish coloured. After the iris has flowered, in August, it produces an elliptical seed capsule, which is about 3 cm long. The capsules dehisce (split open), below the apex. Inside the capsules, are wrinkled, light brown, or brown, pyriform (pear-shaped) seeds.
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149 King penguin egg The female penguin lays one pyriform (pear-shaped) white egg weighing 300 g (⅔ lb).Williams, p. 150 It is initially soft, but hardens and darkens to a pale greenish colour. It measures around . The egg is incubated for around 55 days with both birds sharing incubation in shifts of 6–18 days each.
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The size of the shell varies between 44 mm and 95 mm. The narrow, somewhat pyriform shell has a concavely elevated spire, carinated at the sutures. The shell is nearly perfectly smooth on the under side only. On two-thirds of the body whorl are unusually distant, impressed grooves to be traced, and even these are almost obsolete.
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After the iris has flowered, between June and July, or up to August, it produces an ovoid, or fusiform (spindle shaped), seed capsule. That is between long, and 1.5–2 cm in diameter. It has a beak like top, attached to the remains of the perianth tube. Inside the capsule are roundish, or pear shaped (pyriform), seeds.
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Rodriguésia; Revista do Instituto de Biologia Vegetal, Jardim Botânico e Estaçao Biologica do Itatiaya 59: 209-258. Mature fruits (berries) are pyriform, white and contain seeds spread in a fleshy transparent mucilage. Seeds are falcate-shaped, with a narrow micropylar portion, rough texture, brown-red colour and no appendages.Paulo, M. L., & de Paula, C. C. (2018).
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Romagnesiella is an agaric fungal genus that colonizes mineral, calcareous or sandy soils in Europe and North Africa. The small brownish fruitbodies have narrowly attached, broad and distant lamellae and poorly differentiated cheilocystidia and pleurocystidia. Spores are thick-walled, brown, smooth, and lack germ pore. The cap surface (pileipellis) is somewhat cellular with irregular puzzle-like to pyriform hyphae.
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It has reddish purple, or lilac style branches, which are 3 cm long with deeply fringed (fimbriated) edges. After the iris has flowered, it produces an ovoid- globose, or ovoid-cylindrical seed capsule, between June and August. It is cm long, with veining. Inside the capsule, are pyriform (pear shaped) black brown seeds, with a white aril.
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It is marked by twelve slender, spiral cords which are a little wider than the spaces that separate them and become successively narrower and more closely spaced from the periphery to the umbilical area. The spaces between the cords are marked by numerous slender, axial threads. The aperture is pyriform, and slightly effuse anteriorly. The posterior angle is acute.
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The pyriform scale is known from Australia, South Africa, Israel, Italy, France, Spain, Cuba, Florida, and Peru. It is normally found on avocado, and in Peru it is said to be the worst insect pest of avocado, but in Spain it has also been found on citrus. Certain cultivars of avocado seem more susceptible to attack than others.
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The male then shuffles around the female. Several males may display to females and they may be close together. The eggs are laid in a ground scrape or depression sometimes fringed with pebbles, goat or hare droppings. About 3–4 black-blotched buff eggs shaped a bit like a peg-top (pyriform), 42x30 mm on average.
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The capsule is long and between 1.3–1.5 cm wide, and has 6 longitudinal ribs and a short beak appendage (at the top). It dehisces (splits open) from the middle of the capsule. Inside the capsule are seeds which are 3 mm (in diameter), flattened globular, or pyriform (pear shaped), wrinkled, and reddish brown in colour.
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The base of the shell is contracted. The suture is somewhat impressed, lightly margined below. The aperture is pyriform, broadly angled above, with a short, broad, oblique, and truncated siphonal canal below. The outer lip is convex, thickened by an axial rib, slightly angled above, and somewhat contracted below, with a shallow broad sinus at the suture.
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The subhymenium is ramose-inflated. Pileus trama is radial, with hyphae 5–32 μm, yellowish to yellowish brown, thick walled (0.5–1 μm). Pileipellis an ixocutis, (9–) 12–54 μm wide, hyphae 1.5–4 (–5.5) μm diameter, hyaline and thin-walled. Pileocystidia (10–) 12–28 × 4–9.5 μm, globose, cylindrical, clavate, flexuose or pyriform and thin-walled.
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The growth lines lean forward with respect to the direction of the cone. The aperture is pyriform. The upper part of the outer lip is straight up to the middle where it forms a strong angle and then the lower part curves gently toward the columella. The periphery of the body whorl forms an acute angle.
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The base of the body whorl is well rounded. It is marked by six spiral cords of which the two anterior ones are a little weaker than the rest; separated by spaces which are a little narrower than the cords and crossed by numerous fine axial threads. The aperture is pyriform. The posterior angle is acute.
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The length of the shell attains 7.5 mm, its diameter 3.75 mm. (Original description) The pyriform, ivory- white, thin, fragile shell has an acute spire. It contains 8 whorls 8, of which 4 form a light-brown protoconch. They are convex, with remote riblets on the upper part, oblique, and with less stronger ones, which cross each other, in the lower part.
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Full tapeworm observations in the past have included a worm that was 130 mm long, 15 mm in width, and 2.5 mm in thickness. It had a scolex, neck, and 418 proglottids. Differences in human species: B. mucronata has smaller eggs than B. studeri. There are filaments arising from the pyriform apparatus clearly identifiable on B. studeri but not B. mucronata.
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It has whitish to pale lilac purple Stigma (botany)#Style branches, that are long and 1–2 cm wide. After the iris has flowered, between June and July, it produces an ellipsoid seed capsule, that is long and 2–2.5 cm wide. Inside, are reddish brown seeds, that are pyriform (pear-shaped) or sub- globose, with a rugose (wrinkled) coating.
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Murre eggs Common murre eggs are large (around 11% of female weight), and are pointed at one end. There are a few hypotheses to explain their pyriform shape: # If disturbed, they roll in a circle rather than fall off the ledge. # The shape allows efficient heat transfer during incubation.Johnson (1941) # As a compromise between large egg size and small cross-section.
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The fertile cone scale has a single inverted ovule developing into a seed. The seed is entirely enclosed by a modified ovuliferous scale known as the epimatium. The epimatium is green or glaucous at first and becomes fleshy and red in color at maturity. The mature epimatium is generally 14-20 millimeters long, 10-13 millimeters wide and pyriform in shape.
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The aperture is mutilated in all available specimens, narrowly pyriform, expanding slightly posteriorly. The outer lip is widely flaring incrementally, narrowly but deeply sinuated in front of the anterior primary, distantly lirated within. The lirae are not persistent to the margin. The parietal wall is thinly glazed, not entirely concealing the lirae upon the base of the body and the columella, which continue far within the aperture.
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Before differentiating into adiaspores, the conidia measure 2-4 μm in diameter and are shaped either ovoid, subglobose or pyriform with glabrous walls. After growth at 40 °C the conidia morph into their adiaspore form enlarging to approximately 25 μm in vitro and 40 μm in vivo. These adiaspores are uninucleate and they do not replicate. They are occasionally mistaken for spherules of the organism Coccidioides immitis.
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Lesions can have both the filamentous and vesicular type grains at the same time. Although conidation, a form of asexual reproduction, in M. mycetomatis is rare, two main types can be described in-vitro. In the first type oval to pyriform conidia, 3 to 5 µm can be observed. The conidia have truncated bases and are on the tips of simple or branched conidiophores.
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Acrocnida follows the body plan of other Amphiuridae, as they possess central disks surrounded by five long, thin arms. They only possess one outer mouth papilla, which is removed from the infradental papillae. Members of Acrocnida possess mucous glands described as "multecellular aggregations of pyriform cells with elongate necks" Like other members of Ophiurida, Acrocnida can part with limbs and regenerate a new limb.
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Trachelomonas is a genus of swimming, free-living euglenoids characterized by the presence of a shell-like covering called a lorica. Details of lorica structure determine the classification of distinct species in the genus. The lorica can exist in spherical, elliptical, cylindrical, and pyriform (pear- shaped) forms. The lorica surface can be smooth, punctuate or striate and range from hyaline, to yellow, or brown.
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The connectivity of the OFC varies somewhat along a rostral- caudal axis. The caudal OFC is more heavily interconnected with sensory regions, notably receiving direct input from the pyriform cortex. The caudal OFC is also the most heavily interconnected with the amygdala. Rostrally, the OFC receives fewer direct sensory projections, and is less connected with the amygdala, but it is interconnected with the lateral prefrontal cortex and parahippocampus.
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On the smooth glossy protoconch is a pronounced median keel, which ends abruptly at the topmost rib. The aperture is pyriform and produced into a short, wide, open siphonal canal. Behind the lip is a prominent varix which, rising above the suture, fills an intervariceal space on the preceding whorl. A substantial callus sheet spreads on the inner lip, and a tubercle is formed near the right insertion.
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Dart proposed the idea of dual evolutionary origins of the neocortex. During his research in the 1930s in Africa, he studied the architecture of reptilian brains. He was able to identify a "premordial neocortex" (paraphrased), the oldest structure that can be considered as a neocortex, in a reptile. He identified a distinction between the cytoarchitecture in an area which split it into a Para-Hippocampal and a Para- Pyriform region.
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Juvenile plants bear needle- like leaves 4–8 mm long. The cones are irregularly globose to broad pyriform (4–6 mm long and 5–8 mm broad), soft and berry-like, green at first, maturing bluish-purple about 8 months after pollination. They contain one or two (rarely three) seeds. The male cones are 4–6 mm long and begin yellow, turning brown after pollen release in early spring.
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The adult female pyriform scale is pear-shaped or heart-shaped, about in length, and is protected by a reddish-brown scale with radial stripes. In mature individuals, the scale hardens and the fluffy white ovisac projects slightly from underneath the scale. Male individuals are not known in South Africa, but have been observed in Florida. The nymphs are pale green, flat and oval, and the eggs are pale yellow.
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The fossil record for Phacus, like most Euglenophyta, is very scarce, and little information is actually known of their geographical origins. However, there have been reports that Phacus-like microfossils have been discovered from pyriform cells, which seem to closely resemble that of Phacus or another closely related genus, Lepocinclis. These fossils, although not certain to belong to the genus, are estimated to be over 60 million years old.
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They are minute rounded or pyriform parasites found within erythrocytes, or other circulating or endothelial cells of vertebrates, where they reproduce by merogony. The trophozoite stage is separated from erythrocyte by a single membrane. This distinguishes them from other blood parasites that usually have at least two membranes. An apical complex with a polar ring and rhopteries occurs, but without a conoid and usually without associated pellicular microtubules.
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Edwards's work has appeared in numerous publications, such as anthologies Blood and Tears: Poems for Matthew Shepard, Painted leaf Press (2000), and Electric Spandex: anthology of writing the queer text (Pyriform Press: 2002). Her works have also been exhibited throughout the U.S. A posthumous book of edwards's poetry, succubus in my pocket, published in 2015 by EOAGH won a 2016 Lambda Literary Award in the category of Transgender Poetry.
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Its antennae, tentacular and dorsal cirri are spindle-shaped to pyriform, with somewhat bulbous bases. It carries a single pair of anal cirri similar to dorsal cirri although a bit longer. Its compound chaetae are heterogomph, with short or long blades, sometimes bidentate, unidentate, or a combination of both. Its pharyngeal tooth is small, conical to rhomboidal in shape, located near the pharyngeal anterior margin, sometimes near its middle.
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Ovulids mostly have smooth shiny shells with a very long aperture and a very low or invisible spire. The shell can be pyriform (shaped like a pear), ovate (egg-shaped) to sub-ovate, cylindrical or lanceolate (lance-shaped). The shell is often monochromatic white, but in some species the shell is pink or reddish. In a few species of ovulids, the shell quite closely resembles that of cowries.
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Buds form that have an ovoid or pyriform shape with a calyx calyptrate that sheds early. Unlike most Eucalypts E. stoatei almost exclusively pollinated by birds, particularly honeyeaters instead of insects. Insects are not able to access the large pendulous flowers because the stamens form an impassable dome over the floral cup. Only a narrow channel lined with anthers allows access to the nectar at the centre of the floral dome.
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The subsutural band is distinguished from the rest of the surface only by the direction of the growth striae that are arched in the opposite direction. At the base of the upper whorls, there are some very short longitudinal threads. The top of the holotype is in very bad condition so we cannot see if these are the vestiges of a general sculpture of the embryonic whorl. The aperture is slightly pyriform.
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The mature buds have an obovoid to pyriform shape with a length of and a width of with a rounded to conical and beaked operculum and white flowers. The species can flower as early as January but usually flowers between March and August. The fruits that appear after flowering are pedicellate with an urceolate to barrel shape. They are around in length and wide with a descending disc and three or four enclosed valves.
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An individual spider spins a multitude of silk types, with each type emerging from its own distinctive set of abdominal silk glands. This complex silk machinery enables spiders to use task-specific silks (e.g., for web assembly, egg-case construction, prey wrapping, etc.). The different types of silk (major ampulate silk, minor ampulate silk, flagelliform silk, aciniform silk, tubiliform silk, pyriform silk, and aggregate silk) are composed of different types of proteins.
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Leccinum manzanitae mushroom produce a cinnamon-brown spore print. Spores are 13–17 by 4–5.5 µm, somewhat elliptical to cylindrical, and tapered on each end (fusoid); their walls are smooth and moderately thick. The spore-bearing cells, the basidia, are 27–32 by 6–9 µm, club-shaped to pear-shaped (pyriform) and four-spored. The cystidia are 23–32 by 4–6 µm, fusoid to club-shaped with narrow, elongated apices.
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Prepyriform area (or prepiriform cortex) is a portion of the rhinencephalon consisting of paleocortex. Some sources state that it is part of the primary olfactory cortex. Prepyriform Cortex along with Pyriform cortex And Cortical portion of amygdaloid nuclei constitute lateral olfactory area which send signal to almost all portion of limbic system such as hippocampus, which seem to be most important area for learning to like and dislike foods depending upon one's experience with them.
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The leaves are generally long and wide, and the petioles, or leaf stalks, are generally long. The buds of Psidium galapageium are pear-shaped or "pyriform" and connected to the base of the branchlet, extending about out. The bud is glabrous except for a minute hole at the apex with a few trichomes protruding outward. Flowers of Psidium galapageium are white, occur on branches of recent growth, and are relatively small, being in diameter.
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The leaf blade has a lanceolate shape with a length of and a width of and the base tapers to the petiole. The tree usually blooms between February or March and September or November producing orange flowers. The single axillary inflorescences form groups of over seven buds per umbel. The bright green mature buds have a clavate to pyriform shape with a length of and a width of with bright orange flowers.
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Brazilian Journal of Microbiology, 39(2): 321-324. Under the microscope, it can be identified by its immersed, pyriform perithecia (pear-shaped, spore-containing structures), which have a brown exterior wall. The ascospores within the perithecia are ellipsoid in shape, with a smooth exterior and granular cytoplasm. The anamorph (asexual stage) of B. ribis is Fusicoccum ribis, and although less abundant, it is characterized by globose pycnidia containing smooth, hyaline macro- and microconidia.
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Eggs A clutch of 1–3 eggs is laid from August to March, which includes also the peak of the Austral summer tourist season in its range and it is thereby heavily impacted by human activities. The eggs are a matte beige or cream colour heavily sprinkled with dark brown and lavender markings, especially at the larger end of the egg. Pyriform in shape, they measure . Eggs hatch in about 30 days.
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The compound inflorescences are axillary or terminal with long terete peduncles with three buds per umbel. The buds have a clavate to pyriform shape and are in length and wide. When the sessile fruits form they are shortly pedicellate and have a cylindrical to barrel-shaped to cup-shaped to obconical shape with a length of and a width of . The fruits have a vertically descending disc with three or four enclosed valves.
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The 'Parsonage' Pear is of large size, approximately 3 1/4 inches in length by 2 1/2 inches wide. It is pyriform in shape, rounded at the base and often long and turbinate. The skin is yellow in color, with a russet-ed base and crown, and russet markings interspersed across the remaining exterior portions. The stem is 5/8 of an inch long and its flesh is rather granular in texture and buttery.
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Male gametangia have been observed only between April and July (Southern Hemisphere, Australia). They are borne in a similar manner to the female gametangia, and contain 64 zooids, each 5 µm long by 2-3 µm wide. Both gametes are pyriform in shape (pear form) with two laterally inserted flagella (the anterior one longer than the posterior). They each possess one eyespot - and have never been observed to contain two or more.
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The glenoid cavity or glenoid fossa of scapulaThe word glenoid is pronounced or (both are common) and is from , "socket", reflecting the shoulder joint's ball-and-socket form. is a part of the shoulder. It is a shallow, pyriform articular surface, which is located on the lateral angle of the scapula. It is directed laterally and forward and articulates with the head of the humerus; it is broader below than above and its vertical diameter is the longest.
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Ascospores are simple, hyaline, and often small. Conidia generally arise laterally from the joints of conidiogenous hyphae (Parmelia- type), but arise terminally from these joints in a small number of species (Psora-type). The conidia can have a broad range of shapes: cylindrical to bacilliform, bifusiform, fusiform, sublageniform, unciform, filiform, or curved. Pycnidia are immersed or rarely emergent from the upper cortex, are produced along the lamina or margins, pyriform in shape, and dark-brown to black in colour.
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Nerve cells in the posterior thoracic nucleus are most abundant between the lower thoracic and upper lumbar segments. Cell bodies are of medium size and oval- or pyriform-shape. These cells characteristically present coarse Nissl granules and have characteristic eccentric nuclei. Axonal projections from neurons in this nucleus give rise to the dorsal spinocerebellar tract which ascends ipsilaterally through the spinal cord and ends as mossy fibers in the ipsilateral cerebellar cortex after passing through the inferior cerebellar peduncle.
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The leaves are opposite, elliptical or obovate, up to 16 cm long and 10 cm broad, with an entire margin and an emarginate (notched) apex. The flowers are small, pale whitish-yellow, fragrant, with a four-lobed corolla. The fruit is a globose to turbinate drupe 2–3 cm diameter, apiculate, bright yellow ripening dark purple, drying hard, dark brown, slightly rough with a single pyriform, dark russet seed, 10–12 mm long. The cotyledons are unequal.
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Colonies of M. thermophila initially appear cottony-pink, but rapidly turn cinnamon-brown and granular in texture. It can be distinguished from the closely related Myceliophthora lutea by the thermophilic character of the former, and its more darkly pigmented, markedly obovate conidia. Microscopic examination reveals septate hyphae with several obovoidal to pyriform conidia arising singly or in small groups from conidiogenous cells. Conidia are typically 3.0-4.5μm x 4.5-11.0μm in size, hyaline, smooth, and thick-walled.
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P. americana, avocado plant flowers Avocado trees are vulnerable to bacterial, viral, fungal, and nutritional diseases (excesses and deficiencies of key minerals). Disease can affect all parts of the plant, causing spotting, rotting, cankers, pitting, and discoloration. The pyriform scale insect (Protopulvinaria pyriformis) is known from Australia, South Africa, Israel, Italy, France, Spain, Cuba, Florida, and Peru. It is normally found on avocado, and in Peru it is said to be the worst insect pest of the fruit.
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During swallowing, food has the "right of way", and air passage temporarily stops. Corresponding roughly to the area located between the 4th and 6th cervical vertebrae, the superior boundary of the laryngopharynx is at the level of the hyoid bone. The laryngopharynx includes three major sites: the pyriform sinus, postcricoid area, and the posterior pharyngeal wall. Like the oropharynx above it, the laryngopharynx serves as a passageway for food and air and is lined with a stratified squamous epithelium.
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It has a perianth tube is 1.7–2 cm long, the style branch is normally pale violet with darker keels (connecting points) and 1–1.6 cm long. It also has a pale violet filament, which is 1.2–1.7 cm long and a 1–1.2 cm long anther. After the iris has flowered, in mid June, it produces an oblong shaped seed capsule, which is visibly grooved. Inside the capsule, are pyriform (pear shaped), reddish brown and wrinkled seeds.
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Chilomastix is a genus of pyriform excavates within the family Retortamonadidae All species within this genus are flagellated, structured with three flagella pointing anteriorly and a fourth contained within the feeding groove. Chilomastix also lacks Golgi apparatus and mitochondria but does possess a single nucleus. The genus parasitizes a wide range of vertebrate hosts, but is known to be typically non-pathogenic, and is therefore classified as harmless. The life cycle of Chilomastix lacks an intermediate host or vector.
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Mostly pyriform spores of Hamiltosporidium tvaerminnensis Spores of Hamiltosporidium magnivora H. magnivora reproduces sexually, while H. tvaerminnensis has an obligatory asexual status. All stages of vegetative reproduction (merogony) are enclosed by a thick plasma membrane, which is in direct contact with the cytoplasma of the host cell. In all stages the nuclei is isolated and clearly visible. The onset of the sporogony is the production of a sporophorous vesicle that is connected to the plasma membrane by tubules.
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Archaeological Museum of Nafplion: pyriform jar from chamber tomb 10 of the Dendra cemetery (1500-1450 BC) During this phase, Minoan civilization slowly decreased in importance and eventually the Mycenaeans rose in importance, possibly even temporarily being in control of the Cretan palace of Knossos. The mainland pottery began to break away from Minoan styles and Greek potters started creating more abstract pottery as opposed to the previously naturalistic Minoan forms. This abstract style eventually spread to Crete as well.
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A second duct of unknown origin and function entering portal of male copulatory organ. Male copulatory organ reniform, quadriloculate, with short tapered cone; walls of chambers comparatively thick; distal tube elongate; retractile filament not observed. Germarium pyriform, dorsoventrally looping right intestinal cecum; Mehlis’ gland not observed; uterus delicate, with variable diameter. Vaginal sclerite with distal tube having single recurve before its attachment to vaginal vestibule; pear-shaped chamber with thick walls and small cavity; vaginal canal and seminal receptacle not observed.
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Uredospores are subglobose to ovoid or pyriform, echinulate, and measure 25.74 to 37.18 x 17.16 to 27.17 μm, with thickened walls apical walls (1.3 to 1.6 μm) and one to two equatorial germ pores. In addition, the overwintering spores that produce basidiospores, also known as teliospores, have been located on the leaf surface. The teliospores range from cylindrical, clavate to club shaped, with rounded apex and sized from 50−83 × 14−21 μm. Basidiospores are the sexual spores of rusts.
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French red and green varieties The pear exhibits a pyriform "pear shape," with a rounded bell on the bottom half of the fruit, and then a definite shoulder with a smaller neck or stem end. Williams are aromatic pears, and have what many consider the definitive "pear flavour". Colours of the pear vary from green (when unripe), to yellow (ripe) and red. Red Bartletts or Williams are very similar to the traditional Williams, aside from ripening to a reddish colour rather than a yellow colour.
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While predominantly a bird of ridged and hilly forests, chiefly broadleaved forests at altitudes of , it has also been recorded in dry woodland. The nesting period is from March to June, the trees preferred are tall and have broad girths. These hornbill communities move between one forest to another depending on seasonally to forage from fruiting trees that change with local conditions. Describing the egg, Hume (1889) states: :The egg is a broad oval, compressed somewhat towards one end, so as to be slightly pyriform.
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Large size allows quick development of the chick. Small cross-sectional area allows the adult bird to have a small cross-section and therefore reduce drag when swimming. # Due to its pyriform shape, a higher proportion of the eggshell is in contact with the cliff minimising the effects of impact by neighbouring birds. # In dense colonies, there is much faeces, however the majority of faecal contamination is on the pointed end of the egg, therefore the blunt end is cleaner where the chick emerges.
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The characteristic spiny capillitia The fruit body usually grows to a diameter of , although extremes of and have been reported. Its shape ranges from roughly spherical, to obovate (egg- shaped) or pyriform (pear-shaped), sometimes plicate (crumpled, wrinkled) around a somewhat fibrous, persistent tuft of mycelium. The puffball is initially covered by a thick, felted, whitish layer (the exoperidium). This is continuous at first but eventually cracks and peels away in thin flakes, exposing a leathery to corky, nearly smooth, light brown to dark pinkish-brown surface.
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The base of the body whorl is attenuated, well rounded, and marked by eight subequal and subequally spaced low spiral cords, the grooves between which are crossed by many slender axial threads. The summit of the last whorl falls below the first basal keel and leaves this in the suture. On the last half of the last turn, an additional slender spiral thread divides the space between the first and second and second and third strong spiral cords. The aperture is pyriform, somewhat effuse anteriorly.
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It has pale style branches, that are 0.6–1 cm long, with deltoid crests. It has 1.5 cm long filaments, very pale violet, oblong and 1 cm long ovarys, blue edged anthers and white or bluish pollen. After the iris has flowered, in August, it produces a cylindrical, blunt and triangular, or oblong, hexagonal seed capsule, that is long, and 1.3–2.3 cm wide, with 6 grooves. Inside the capsule, are obovate,Vít Bojnanský and Agáta Fargašová ovoid, globose or pyriform (pear shaped) seeds, that are brown or dark reddish brown, rugose (wrinkled).
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These 10 groups are based on a survey conducted of the African species of Difflugia The 10 shell shape classifications are lobed, collared, compressed, urceolate, globose, ovoid-globose, elongate, acute angled, horned and pyriform. WIkiwiki Difflugia was initially discovered in 1815 by L, Leclerc [2], but its infra-generic classification as a group is still unclear. The genus Difflugia is the oldest and most diverse of the testate amoebae. It contains more than 300 species and countless subspecies since even minor differences in morphology result in classification as a new species.
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The color of the shell of the white- toothed cowry varies from a chocolate-brown to butterscotch with whitish spots of varying size and degrees of contrast. The dorsal mantle stripe is very distinctive in this species. The living animal has a mottled (blackish-brown and light tan) mantle with short and long colorless papillae, a blackish siphon and tan foot. A number of subspecies and forms have been described including: C. leucodon leucodon (pyriform nominate); angioyna (slight tooth differences); tenuidon (smaller, heavily spotted and rounder); and escotoi (small, dark and very round).
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Germarium pyriform; germarial bulb dextral, lying diagonally at body midlength, with elongate dorsoventral loop around right intestinal cecum; ootype lying to left of body midline; Mehlis' gland not observed; uterus delicate, banana shaped when empty. Common genital pore ventral, dextral to MCO. Vaginal pore sinistroventral at level of seminal vesicle; vagina with distal vestibule; vaginal sclerite having sclerotized tube with distal recurved and funnel-shaped terminus opening into vestibule; single chamber usually spherical, with thick wall; proximal vaginal canal delicate, leading to seminal receptacle. Seminal receptacle near body midline.
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Ancistrochilus rothschildianus is a sympodial epiphytic plant with wide, conical or pyriform pseudobulbs that each carry two to three broad, acute, lanceolate leaves. The shape of the pseudobulbs has been described as similar to that of Hershey's Kisses. A deciduous species from a region with a very pronounced dry season, A. rothschildianus goes into a state of abscission and loses leaves before it comes into flower. At the end or the dry season, the flowers appear from the base of the mature, leafless pseudobulb in a pubescent inflorescence.
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Adult males remain vermiform and get out of the root while females swell and obtain the pyriform/round shape. Females lay eggs in the gelatinous matrix which hatch again and the cycle is repeated if environmental conditions are favorable.Siddharth Tiwari and, Jon D. Eisenback, Roger R. Youngman, 2009. Root-knot Nematode in Field Corn Department of Entomology, Virginia Tech 2Department of Plant Pathology, Physiology, and Weed Science, Virginia Tech 3Extension Entomologist, Virginia Tech The length of the life cycle depends on environmental factors mostly temperature and host status.
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Its prostomium is wider than long, with 4 coalescent lensed eyes arranged trapezoidally; anterior eyespots are absent. It counts with pyriform antennae with bulbous bases and elongated tips, its median antenna measuring 40 µm long, while lateral ones measure 33 µm, which is longer than its prostomium and palps together. Its median antenna is inserted between its anterior pair of eyes, the lateral ones attached on the anterior margin of its prostomium. The animal's palps are ventrally-directed, fused along their length and with a dorsal notch and few small papillae.
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Microcotyle tampicensis has the general morphology of all species of Microcotyle, with an elongated body, a rounded anterior end and a smooth cuticle, comprising an anterior part which contains most organs and a posterior part called the haptor. The haptor is asymmetrical and bears numerous clamps, arranged as two rows, one on each side (48 clamps on the left side and 50 on the right). The clamps of the haptor attach the animal to the gill of the fish. There are also two pyriform septate buccal suckers at the anterior extremity.
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The concolorous, dull, grey-green to pale green blade has a length of and a width of . It blooms around July and produces axillary compound inflorescences in groups of three buds per umbel. The obovoid to pyriform shaped mature buds have a length of and a width of with a flattened operculum and shallow inflexed stamens and white flowers. The pedicellate fruits that form after flowering have a cupular to cylindrical or barrel shape with a length of and a width of with a descending disc and three enclosed valves.
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Though they don't construct webs, both sexes possess a silk apparatus. A study of the type species, O. striatipes, revealed that they possess a simpler and more primitive spigot system than other wandering spiders, as even the females possess neither tubuliform glands for cocoon production, nor triad spigots for web-building. Males and females do however have three types of silk gland, which are classified as ampullate, pyriform and aciniform. Four ampullate glands are connected to the anterior spinnerets, while eight minor ampullate glands are connected to the median spinnerets.
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Silk proteins present in other spider silk types are also occasionally referred to as spidroin. These include tubuliform slik protein (TuSP), flagelliform silk protein (Flag; --), minor ampullate silk proteins (MiSp; ), aciniform silk protein (AcSP), pyriform silk protein (PySp) and aggregate silk glue (ASG2/AgSp). These different silk proteins along with MaSP show some level of homology to each other, in protein domains, repeats, and in promoters, but also have their own unique features and variations on these parts to furfill their different functions. These commonalities point at a common origin of proteins found in all these different types of silks.
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The piriform aperture, pyriform aperture, or anterior nasal aperture, is a pear-shaped opening in the human skull. Its long axis is vertical, and narrow end upward; in the recent state it is much contracted by the lateral nasal cartilage and the greater and lesser alar cartilages of the nose. It is bounded above by the inferior borders of the nasal bones; laterally by the thin, sharp margins which separate the anterior from the nasal surfaces of the maxilla; and below by the same borders, where they curve medialward to join each other at the anterior nasal spine.
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The stem-like cone granules, fewer in number than the rod granules, are placed close to the membrana limitans externa, through which they are continuous with the cones of the layer of rods and cones. They do not present any cross-striation, but contain a pyriform nucleus, which almost completely fills the cell. From the inner extremity of the granule a thick process passes into the outer plexiform layer, and there expands into a pyramidal enlargement or foot plate, from which are given off numerous fine fibrils, that come in contact with the outer processes of the cone bipolars.
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Most are cold-hardy, withstanding temperatures as low as in winter, except for the evergreen species, which only tolerate temperatures down to about . The flowers are white, rarely tinted yellow or pink, diameter, and have five petals.Pear Fruit Facts Page Information. bouquetoffruits.com Like that of the related apple, the pear fruit is a pome, in most wild species diameter, but in some cultivated forms up to long and broad; the shape varies in most species from oblate or globose, to the classic pyriform 'pear-shape' of the European pear with an elongated basal portion and a bulbous end.
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Inside the ascomata, the shape of the spore bearing asci of the fungi can range from pyriform to ovate to clavate to ellipsoidal The asci of the fungi are also always 8-spored, and evanescent - disintegrating varying in size from 24x14 μm to 40-20μm The Ascospores of the fungi are unicellular, brown-dark green in colour, and ellipsoidal. The ascospores of the fungi are also observed to only have germ pores at 1 end, with the other end being truncated. The dimension of the ascospores range from 9x5 - 16x9 μm. The species present no anamorphic or asexual form.
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Microconidia are hyaline, single-celled, pyriform to clavate, smooth-walled, 2.5–3.5 by 4–7 um in size and are not diagnostic for any one species. The separation of this genus from Trichophyton is essentially based on the roughness of the macroconidial cell wall, although in practice this may sometimes be difficult to observe. Seventeen species of Microsporum have been described; however, only the more common species are included in these descriptions. The keratinolytic properties that the Microsporum cookei possesses suggests that the fungus can alternatively be used for recycling the large amount of industrial keratinic waste.
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The suture is bimarginate, above by a minute threadlet, below by a broad and heavy cord which is obliquely irregularly plicated. The aperture is pyriform, angled above, with a concave inner wall, ending in a short broad canal, which turns slightly to the left. The outer lip is curved and imperfect The lines of growth would indicate that the sinus is situate in the excavation below the sutural cord, that it is small and moderately deep. The inner lip spread as a thin layer narrowly over the body, broader over the columella, which is first straight and then slightly twisted to the left, ending in a sharp point.
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Testis ovate, lying sinistroposterior to germarium along body midline; proximal vas deferens not observed; seminal vesicle a simple dilation of distal vas deferens, lying posterior to male copulatory organ; ejaculatory bulb and duct not observed; large vesicle (prostatic reservoir?) lying dextral to distal chamber of male copulatory organ. Male copulatory organquadriloculate, with thick walls, short distal cone, elongate tube, protruding filament variable in length. Germarium pyriform; germarial bulb lying diagonally at body midlength, with dorsoventral distal loop around right intestinal cecum; ootype lying to left of body midline, with well-developed Mehlis’ gland; uterus delicate, banana shaped when empty. Common genital pore ventral, dextral to MCO.
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In earlier work, the differentiation of F. sporotrichioides from other fusaria is mainly based on differences in conidial morphology. For example, the basal cells of macroconidia in some Fusarium species have hooks or notches whilst others do not, but these differences are not always sufficient to distinguish closely related fusaria from one another. A feature unique to F. sporotrichioides compared to taxonomically related species is the presence of multiporous cells, known as polyphialides, which are now carefully considered in its identification. The fact that these polyphialides produce pyriform as well as fusiform microconidia is a further distinctive feature of F. sporotrichioides, and the blastospores of F. sporotrichioides are a crucial characteristic in its distinction from the similar F. tricinctum.
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Trophozoites of Chilomastix have been described as pyriform, lemon-shaped or pear-shaped in various species with a rounded anterior and an elongated posterior end that comes to a point. Four flagella are present in all species; three flagella extend anteriorly and move freely, while the fourth flagellum is located within the feeding groove that acts as the cell mouth. This fourth, posteriorly orientated flagellum is vaned, due to the presence of two wing-like structures that extend from it. The feeding groove and fourth flagellum are positioned in the anterior region of the body and work together, involved in the function of endocytosis, enabling the movement of food particles towards the feeding groove.
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Comparison of plum stones: Shropshire damson shown top row, second from left (no. 2). From Charles Darwin's Variation of Animals and Plants under Domestication The main characteristic of the damson is its distinctive rich flavour; unlike other plums it is both high in sugars and highly astringent.Greenoak, F. Forgotten fruit: the English orchard and fruit garden, A. Deutsch, 1983, p.77 The fruit of the damson can also be identified by its shape, which is usually ovoid and slightly pointed at one end, or pyriform; its smooth-textured yellow-green flesh; and its skin, which ranges from dark blue to indigo to near-black depending on the variety (other types of Prunus domestica can have purple, yellow or red skin).
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The cells laid closer to the pia and displayed smaller, often triangular or pyriform somata, and less complex processes that lacked the ascending branchlets and had a more superficial location than the cells Retzius previously described, The cells' different morphologies and the fact that Cajal and Retzius used different species at different developmental periods led to discussion about the definition of Cajal–Retzius cells. In fact immunohistochemical studies performed at advanced developmental stages in human and macaque cortex visualize cells more similar to the cells Cajal described. In contrast, studies from 1994 of the human mid- gestation period describe cells closer to the Retzius type. The early descriptions by Cajal and Retzius referred to the neocortex, but since 1994 similar cells have been found in the marginal zone of the hippocampus.
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Paired dorsal bar with spatulate medial end. Hook with elongate depressed thumb, delicate point, uniform shank; filamentous hook (FH) loop nearly shank length. Testis ovate, lying sinistroposterior to germarium; proximal vas deferens, prostatic reservoir not observed; seminal vesicle an indistinct dilation of distal vas deferens, lying just posterior to MCO; ejaculatory bulb not observed. Male copulatory organ (MCO) reniform, quadriloculate, with short distal cone, elongate tube with comparatively thick walls, delicate apparently retractile distal filament; walls of two distal chambers thick, walls of proximal two chambers thinner but comparatively rigid. Germarium pyriform, shaped as an inverted comma; germarial bulb lying diagonally at body midlength, with elongate dorsoventral distal loop around right intestinal cecum; ootype lying to left of body midline, with well-developed Mehlis’ gland and giving rise to delicate banana- shaped uterus when empty.
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Workers of Tatuidris present a distinctive morphology, consisting of a shield-like head with a broad vertex (upper surface of the head), ventrally-turned heavy mandibles which do not overlap at full closure, deep antennal scrobes (an impression that receives parts of the antenna) with eyes at or close to their apex, compact and fused mesosoma, 7-segmented antenna, first gastral segment ventrally directed, and unique among ants – an antenna socket apparatus sitting upside-down on the roof of the expanded frontal lobe. The body of a worker is short and compact, ferruginous-colored to dark red, with thick and rigid integument (external "skin"). The body is covered by hairs, which are variable in length and inclination. The head is pyriform (pear-shaped), broadest behind, with small eyes.
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197 The exact origin of Prunus domestica subsp. insititia is still extremely debatable: it is often thought to have arisen in wild crosses, possibly in Asia Minor, between the sloe, Prunus spinosa, and the cherry plum, Prunus cerasifera. Despite this, tests on cherry plums and damsons have indicated that it is possible that the damson developed directly from forms of sloe, perhaps via the round-fruited varieties known as bullaces, and that the cherry plum did not play a role in its parentage. Insititia plums of various sorts, such as the German Kriechenpflaume or French quetsche, occur across Europe and the word "damson" is sometimes used to refer to them in English, but many of the English varieties from which the name "damson" was originally taken have both a different typical flavour and pear-shaped (pyriform) appearance compared with continental forms.
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Testis subspherical, lying immediately posterior to germarium; proximal vas deferens not observed; seminal vesicle a simple dilation of distal vas deferens, lying just posterior to MCO; ejaculatory bulb apparently absent; large vesicle (prostatic reservoir?) with translucent contents lying dorsal to common genital pore. MCO reniform, quadriloculate, with moderately long cylindrical distal cone; distal tube with delicate wall; terminal filament delicate, variable in length; walls of three distal chambers comparatively thick; proximal chamber with delicate wall, frequently collapsing during mounting of specimen on slide. Germarium pyriform; germarial bulb lying slightly to right of body midline, with elongate dorsoventral distal loop around right intestinal cecum; ootype lying slightly to left of body midline, with well-developed Mehlis’ gland and giving rise to delicate banana-shaped uterus when empty. Common genital pore ventral, dextral to distal chamber of MCO.
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Trout- perch fish have been found infected by a variant of Myxobolus, which names is Myxobolus intramusculi and is a protist that acts as a muscular parasite. A study found that this strain of protist produces smaller (13-14.5 micrometres long vs 15-17 micrometres long), yet identical shape (narrow pyriform) spores than the original strain of protozoa and affects primarily within red and white muscle fibers and only rarely among the subdermal connective tissue in the trout-perch. The parasite grows until it replaces the entire content of the trout-perch cell and appears its developments stops abruptly before rupturing the outer cell membrane of the host cell which means it does not damage the cell significantly and does not have a lethal effect on the host. All the infected trout-perch seemed to have normal health and not any muscle deterioration.
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Cornelius Hendrik "Case" Vanderwolf (1935 – June 16, 2015) was a Canadian neuroscientist. Raised in the rural community of Glenevis, Alberta, Vanderwolf went on to earn a BSc from the University of Alberta and completed graduate work with Donald Hebb at McGill University, completing his PhD in 1962 (Buzsaki and Bland 2015). Following completion of his PhD, Case spent a year at the California Institute of Technology with Roger Sperry (1962–1963) and another year with Konrad Akert, the Founder of the Brain Research Institute of the University of Zurich (1963–1964). Vanderwolf spent over 30 years at the University of Western Ontario in London, Ontario, during which time he published over 140 papers on the relation of hippocampal, neocortical, and pyriform cortical activity to behavior and the dependence of many of these brain-behavior relations on the activity of central neurons that release the transmitter substances acetylcholine and serotonin.
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Pears and Perry Making in the UK , accessed 8 December 2009 These local pears are particularly known for their picturesque names, such as the various "Huffcap" varieties ('Hendre Huffcap', 'Red Huffcap', 'Black Huffcap', all having an elliptical shape), those named for the effects of their product ('Merrylegs', 'Mumblehead'), pears commemorating an individual ('Stinking Bishop', named for the man who first grew it, or 'Judge Amphlett', named for Assizes court judge Richard Amphlett), or those named for the place they grew ('Hartpury Green', 'Bosbury Scarlet', 'Bartestree Squash'). The perry makers of Normandy grew their own distinctive varieties such as Plant de Blanc, Antricotin and Fausset; the perry of Domfront, which has been recognised with AOC status since 2002 and PDO status since 2006, must be made with a minimum of 40% Plant de Blanc.Le Poire Domfront, accessed 23-05-2018 Pear cultivars used for perry-making tend to be small in size, turbinate or pyriform in shape, and too astringent for culinary use.
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This is possibly due to the olfactory system's close anatomical ties to the limbic system and hippocampus, areas of the brain that have long been known to be involved in emotion and place memory, respectively. Since any one receptor is responsive to various odorants, and there is a great deal of convergence at the level of the olfactory bulb, it may seem strange that human beings are able to distinguish so many different odors. It seems that a highly complex form of processing must be occurring; however, as it can be shown that, while many neurons in the olfactory bulb (and even the pyriform cortex and amygdala) are responsive to many different odors, half the neurons in the orbitofrontal cortex are responsive to only one odor, and the rest to only a few. It has been shown through microelectrode studies that each individual odor gives a particular spatial map of excitation in the olfactory bulb.
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