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Choristella Leptalea Radula
''Choristella'' is a genus of sea snails, marine gastropod mollusks in the family Choristellidae.MolluscaBase eds. (2020). MolluscaBase. Choristella Bush, 1897. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=137780 on 2020-08-11 Description (Original description by Bush) This genus is proposed for species of small shells of few convex whorls forming a flattened, little elevated spire with a minute, scarcely raised, nuclear whorl and a large body whorl. The suture is very deep, and somewhat channeled. The umbilicus is small, round, deep, showing some of the whorls with rounded walls. The oblique aperture is nearly circular. The peristome is simple, continuous, slightly attached to the body whorl, and reflected over the umbilicus. The operculum of the type species is thin, roundly ovate. it has a delicate horn color, of few abruptly enlarging whorls indistinctly defined by a spiral thread and showing sinuous transve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Choristella Leptalea
''Choristella leptalea'' is a species of sea snail, a marine gastropod mollusk in the family Choristellidae. Description Distribution This marine species occurs in the Atlantic Ocean off New Jersey, USA. Description The maximum recorded shell length is 4 mm.Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". '' PLoS ONE'' 5(1): e8776. doi:10.1371/journal.pone.0008776. The dull opaque white shell lacks any sculpture. It has a very delicate texture. The shell is a flattened little elevated spire. It consists of 3½ whorls with a large body whorl. The suture is very deep, somewhat channeled. The small umbilicus is round and deep. The nearly circular aperture is oblique. The simple peritreme is continuous, slightly attached to the body whorl and reflected over the umbilicus. The thin operculum is round-ovate and has a delicate horn color. The radula contains numerous rows of delicate colored, rather stout, non-serrate teeth, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peristome (gastropod)
In the shell of gastropod mollusks (a snail shell), the lip is the free margin of the peristome (synonym: peritreme) or aperture (the opening) of the gastropod shell. In dextral (right-handed) shells (most snail shells are right-handed), the right side or outer side of the aperture is known as the outer lip (''labrum''). The left side of the aperture is known as the inner lip or columellar lip (''labium'') if there is a pronounced lip there. In those species where there is no pronounced lip, the part of the body whorl that adjoins the aperture is known as the parietal wall. The outer lip is usually thin and sharp in immature shells, and in some adults (e.g. the land snails '' Helicella'' and ''Bulimulus''). However, in some other land snails and in many marine species the outer lip is ''thickened'' (also called ''callused''), or ''reflected'' (turned outwards). In some other marine species it is curled inwards (''inflected''), as in the cowries such as '' Cypraea''. It can also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Choristella Vitrea
''Choristella vitrea'' is a species of sea snail, a marine gastropod mollusk in the family Choristellidae Choristellidae is a family of gastropods in the superfamily Seguenzioidea Seguenzioidea is a superfamily of minute to medium-sized sea snails, marine gastropod mollusks in the clade Vetigastropoda.Gofas, S. (2010). Seguenzioidea. In: Bouchet, .... Description The shell grows to a size of 3.5 mm Distribution This species occurs in the Pacific Ocean off Japan. References External links * {{DEFAULTSORT:Choristella Vitrea Choristellidae Gastropods described in 1971 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Choristella Tenera
''Choristella tenera'' is a species of sea snail, a marine gastropod mollusk in the family Choristellidae. Distribution This marine species occurs in the Atlantic Ocean off New Jersey and North Carolina, USA. Description The maximum recorded shell length is 10.5 mm.Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". '' PLoS ONE'' 5(1): e8776. doi:10.1371/journal.pone.0008776. The thin shell is fragile and has a smooth surface. It has a heliciform shape, with a low spire and a very large, ventricose body whorl. The shell contains four to five, very convex and evenly rounded whorls. The apical whorl is small, spiral, obliquely upturned and incurved, but not prominent. The suture is deeply impressed. The whorls are largely in contact and united well together, though the periostraca is continuous between them. The large aperture forms more than a half-circle. The outer sideof the aperture is well rounded, the columella margin near ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Choristella Ponderi
''Choristella ponderi'' is a species of sea snail, a marine gastropod mollusk in the family Choristellidae Choristellidae is a family of gastropods in the superfamily Seguenzioidea Seguenzioidea is a superfamily of minute to medium-sized sea snails, marine gastropod mollusks in the clade Vetigastropoda.Gofas, S. (2010). Seguenzioidea. In: Bouchet, .... Description Distribution This marine species occurs off New South Wales, Australia. References External links McLean J.H. (1992). Systematic review of the family Choristellidae (Archeogastropoda: Lepetellacea) with descriptions of new species. The Veliger 35(4): 273-294 {{DEFAULTSORT:Choristella Ponderi Choristellidae Gastropods described in 1992 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Choristella Nofronii
''Choristella nofronii'' is a species of sea snail, a marine gastropod mollusk in the family Choristellidae. Description The shell grows to a size of 3 mm. Distribution This species occurs in the Northern Atlantic Ocean; off Spain and Portugal; in the Mediterranean Sea The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the ea .... References * Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). ''European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification''. Collection Patrimoines Naturels, 50: pp. 180–213 (look up in IMIS) etails* McLean J.H. (1992). ''Systematic review of the family Choristellidae (Archeogastropoda: Lepetellacea) with descriptions of new ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Choristella Marshalli
''Choristella marshalli'' is a species of sea snail, a marine gastropod mollusk in the family Choristellidae. Description Distribution This marine species is endemic to New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 List of islands of New Zealand, smaller islands. It is the .... References {{DEFAULTSORT:Choristella Marshalli Choristellidae Gastropods described in 1992 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Choristella Hickmanae
''Choristella hickmanae'' is a species of sea snail, a marine gastropod mollusk in the family Lepetellidae. Description Shell large for genus (maximum diameter 9 mm), spire height relatively low (height-width ratio of holotype 0.72). Shell wall extremely thin, maximum thickness of broken lip 0.1 mm. Surface dull, yellowish white, periostracum not evident, surface finely pitted. Protoconch and earliest teleoconch whorl missing. Remaining whorls 3.5, rounded, smooth; suture deeply impressed. Umbilicus broad, deep, not obstructed by reflection of inner lip. Spiral sculpture represented only by single narrow ridge deep within umbilicus; axial sculpture lacking, growth increments not apparent. Peristome complete, area of contact with previous whorl minimal. Operculum pale brown, nucleus slightly excentric, final three whorls evenly expanding in multispiral pattern. Height 6.5 mm, width 9 mm. Distribution This marine species occurs in the Cascadia Abyssal Plain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Choristes Elegans Var
Choristes may refer to: * The Chorus (2004 film), a film whose French title is ''Les Choristes'' * a synonym for the plant genus '' Deppea'' * a synonym for the sea snail genus ''Amauropsis ''Amauropsis'' is a genus of predatory sea snails, marine gastropod mollusks in the family Naticidae, the moon snails. Species Species within the genus ''Amauropsis'' include: * '' Amauropsis anderssoni'' (Strebel, 1906) * ''Amauropsis apora'' ...'' See also * '' Emarginula choristes'', a species of sea snails {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radula
The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters the esophagus. The radula is unique to the molluscs, and is found in every class of mollusc except the bivalves, which instead use cilia, waving filaments that bring minute organisms to the mouth. Within the gastropods, the radula is used in feeding by both herbivorous and carnivorous snails and slugs. The arrangement of teeth ( denticles) on the radular ribbon varies considerably from one group to another. In most of the more ancient lineages of gastropods, the radula is used to graze, by scraping diatoms and other microscopic algae off rock surfaces and other substrates. Predatory marine snails such as the Naticidae use the radula plus an acidic secretion to bore through the shell of other molluscs. Other predatory marine sn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Velutina
''Velutina'' is a genus of small sea snails, marine gastropod mollusks in the family Velutinidae.WoRMS (2009). ''Velutina'' Fleming, 1822. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2009) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138631 on 17 June 2011 Species Species within the genus ''Velutina'' include: *'' Velutina coriacea'' ( Pallas, 1788) *'' Velutina cryptospira'' Middendorff, 1848 *''Velutina plicatilis'' (Müller, 1776) *'' Velutina pulchella'' Derjugin, 1950 *'' Velutina schneideri'' Friele, 1886 *'' Velutina tarasovi'' Derjugin, 1950 *''Velutina velutina'' (Müller, 1776) ;Species brought into synonymy : *''Velutina beringensis'' Derjugin, 1950 : synonym of '' Cartilagovelutina beringensis'' (Derjugin, 1950) *''Velutina bifasciata'' Derjugin, 1950 : synonym of '' Limneria undata'' (T. Brown, 1839) *''Velutina canaliculata'' Kröyer, 1847 : synonym of '' Limneria und ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operculum (gastropod)
The operculum (; ) is a corneous or calcareous anatomical structure like a trapdoor that exists in many (but not all) groups of sea snails and freshwater snails, and also in a few groups of land snails; the structure is found in some marine and freshwater gastropods, and in a minority of terrestrial gastropods, including the families Helicinidae, Cyclophoridae, Aciculidae, Maizaniidae, Pomatiidae, etc. The operculum is attached to the upper surface of the foot and in its most complete state, it serves as a sort of "trapdoor" to close the aperture of the shell when the soft parts of the animal are retracted. The shape of the operculum varies greatly from one family of gastropods to another. It is fairly often circular, or more or less oval in shape. In species where the operculum fits snugly, its outline corresponds exactly to the shape of the aperture of the shell and it serves to seal the entrance of the shell. Many families have opercula that are reduced in size, and which a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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