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Choristella
''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 transver ... [...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] |
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 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 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 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] |
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] |
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, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed ... (according to the taxonomy of the Gastropoda (Bouchet & Rocroi, 2017) MolluscaBase eds. (2020). MolluscaBase. Choristellidae Bouchet & Warén, 1979. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=23002 on 2020-08-11 Genera Genera in the family Choristellidae include: * '' Bichoristes'' McLean, 1992 * '' Choristella'' Bush, 1897 References * Bouchet P., Rocroi J.P., Hausdorf B., Kaim A., Kano Y., Nützel A., Parkhaev P., Schrödl M. & Strong E.E. (2017). Revised classification, nomenclator and typification of gastropod and monoplacophoran families. Malacologia. 61(1-2): 1-526 * Haszprunar G. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trenchia Agulhasae
''Trenchia agulhasae'' is a species of small, deep water sea snail, a marine gastropod mollusk in the family unassigned SeguenzioideaMolluscaBase eds. (2020). MolluscaBase. Trenchia agulhasae (Clarke, 1961). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1429995 on 2020-08-11Engl W. (2012) Shells of Antarctica. Hackenheim: Conchbooks. 402 pp. ;Subspecies: '' Trenchia agulhasae argentinae'' (Clarke, 1961) Distribution This species was found in the Agulhas Basin The Agulhas Basin is an oceanic basin located south of South Africa where the South Atlantic Ocean and south-western Indian Ocean meet. Part of the African Plate, it is bounded by the Agulhas Ridge (part of the Agulhas-Falkland Fracture Zone) to .... References External links To World Register of Marine SpeciesClarke, A. H. (1961). Abyssal mollusks from the South Atlantic Ocean. Bulletin of the Museum of Comparative Zoology. 4, 345-387McLean J.H. (1992 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Body Whorl
The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk. In gastropods In gastropods, the body whorl, or last whorl, is the most recently formed and largest whorl (or revolution) of a spiral or helical shell, terminating in the aperture. It is called the "body whorl" because most of the body of the soft parts of the animal fits into this whorl. The proportional size of the body whorl in gastropod shells differs greatly according to the actual shell morphology. For shells in which the rate of whorl expansion of each revolution around the axis is very high, the aperture and the body whorl are large, and the shell tends to be low spired. The shell of the abalone is a good example of this kind of shell. The opposite tendency can sometimes create a high spire with very little whorl increase per revolution. In these instances ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suture (anatomy)
In anatomy, a suture is a fairly rigid joint between two or more hard elements of an organism, with or without significant overlap of the elements. Sutures are found in the skeletons or exoskeletons of a wide range of animals, in both invertebrates and vertebrates. Sutures are found in animals with hard parts from the Cambrian period to the present day. Sutures were and are formed by several different methods, and they exist between hard parts that are made from several different materials. Vertebrate skeletons The skeletons of vertebrate animals (fish, amphibians, reptiles, birds, and mammals) are made of bone, in which the main rigid ingredient is calcium phosphate. Cranial sutures The skulls of most vertebrates consist of sets of bony plates held together by cranial sutures. These sutures are held together mainly by Sharpey's fibers which grow from each bone into the adjoining one. Sutures in the ankles of land vertebrates In the type of crurotarsal ankle which is fou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Umbilicus (mollusc)
The umbilicus of a shell is the axially aligned, hollow cone-shaped space within the whorls of a coiled mollusc shell. The term umbilicus is often used in descriptions of gastropod shells, i.e. it is a feature present on the ventral (or under) side of many (but not all) snail shells, including some species of sea snails, land snails, and freshwater snails. The word is also applied to the depressed central area on the planispiral coiled shells of ''Nautilus'' species and fossil ammonites. (These are not gastropods, but shelled cephalopods.) In gastropods The spirally coiled whorls of gastropod shells frequently connect to each other by their inner sides, during the natural course of its formation. This results in a more or less solid central axial pillar, known as the columella. The more intimate the contact between the concave side of the whorls is, the more solid the columella becomes. On the other hand, if this connection is less intense, a hollow space inside the whorls ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
