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Charisma (gastropod)
''Charisma'' is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails.Bouchet, P. (2012). ''Charisma'' Hedley, 1915. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=512296 on 2012-11-23 Description A genus related to ''Liotia'', but without a varix to the outer lip. The species are few-whorled and spirally sculptured. Their umbilicus has an internal funicle. The operculum is corneous, concave, multispiral, with a spiral frilled lamella. Species * ''Charisma arenacea ''Charisma arenacea'', common name the sandy charisma, is a species of extremely small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Marshall, B. (2013). Charisma arenacea (Pritchard & Gatliff, 1902). Accessed thro ...'' (Pritchard, G.B. & J.H. Gatliff, 1902) * '' Charisma candida'' (A. Adams, 1861) * '' Charisma carinata'' (Verco, J.C., 1907) * '' Charisma compacta'' Hedley, C., 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...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] |
Charisma Simplex
''Charisma simplex'' is a species of extremely small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Marshall, B. (2013). Charisma simplex (Laseron, 1954). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=718887 on 2014-03-12 Description The height of the shell is 1 mm. The shell is a "depressed turbinate" and has a complete peristome. Distribution This marine species is endemic to Australia and occurs off New South Wales. References *Laseron, C. 1954. ''Revision of the Liotiidae of New South Wales''. The Australian Zoologist 12(1): 1-25, figs 1-49a *Iredale, T. & McMichael, D.F. 1962. ''A reference list of the marine Mollusca of New South Wales''. Memoirs of the Australian Museum 11: 1-109 * Wilson, B. 1993. ''Australian Marine Shells. Prosobranch Gastropods''. Kallaroo, Western Australia : Odyssey Publishing Vol. 1 408 pp. External linksTo World Register of Marine Species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charisma Radians
''Charisma radians'' is a species of extremely small sea snail, a marine gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ... mollusk in the family Trochidae, the top snails.Marshall, B. (2013). Charisma radians (Laseron, 1954). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=718886 on 2014-03-12 Description The height of the shell is 2 mm. Distribution This marine species is endemic to Australia and occurs off New South Wales. References *Laseron, C. 1954. ''Revision of the Liotiidae of New South Wales''. The Australian Zoologist 12(1): 1-25, figs 1-49a *Iredale, T. & McMichael, D.F. 1962. ''A reference list of the marine Mollusca of New South Wales''. Memoirs of the Australian Museum 11: 1-109 * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charisma Latebrosa
''Charisma latebrosa'' is a species of extremely small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Marshall, B. (2013). Charisma latebrosa (Hedley, 1907). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=719411 on 2014-03-12 Description The height of the shell is 1.35 mm, its diameter 1.45 mm. The small, buff shell is globose and perforate. The three whorls are flattened beneath the suture, thence rounded to the base. Its sculpture shows about twenty radial puckers that undulate the summit of the 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 b ..., but disappear before reaching the periphery. Around the umbilicus about a dozen similar radial riblets are disposed. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charisma Josephi
''Charisma josephi'', common name the Joseph's charisma, is a species of extremely small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Marshall, B. (2013). Charisma josephi (Tenison Woods, 1877). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=719410 on 2014-03-12 Description The diameter of the shell is 3 mm. The thick shell is widely umbilicated and obliquely turbinate. Its color is white, opaque, maculated with very pale chestnut. The five whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane floral ...s are rounded and closely spirally striate. The thick peristome is posteriorly produced. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charisma Compacta
''Charisma compacta'' is a species of extremely small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Marshall, B. (2013). Charisma compacta Hedley, 1915. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=718885 on 2014-03-10 Description The height of the shell attains 1.9 mm, its diameter 2 mm. The shell is solid and has a turbinate shape. Its colour is pale cream. The four whorls are rather loosely coiled and separated by channelled sutures. The spire-whorls are smooth. The 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 b ... is sculptured with about twenty regularly spaced, sharp, spiral grooves. The umbilicus measures about one-eighth of the shell's diameter; its m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charisma Carinata
''Charisma carinata'', common name the carinate charisma, is a species of extremely small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Marshall, B. (2013). Charisma carinata (Verco, 1907). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=720370 on 2014-03-11 Description The height of the shell is 1.1 mm, its diameter 1.4 mm. The minute, solid shell contains three and a half whorls. The first two whorls are smooth, white and convex. The spire whorl shows three rounded carinations, one just below the suture which is channelled by it, the second about one-third the distance between the sutures, and the third about one-fourth the distance from the lower suture. The interspaces are concave, and have spiral cords, equidistant; two in the upper space, the posterior the smaller; three in the middle space, small and equal. The body whorl The body whorl is part of the morphology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charisma Candida
''Charisma candida'' is a species of extremely small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Bouchet, P. (2013). Charisma candida (A. Adams, 1861). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=732092 on 2014-03-11 Description Distribution This marine species occurs off Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north .... References * Higo, S., Callomon, P. & Goto, Y. (1999) ''Catalogue and Bibliography of the Marine Shell-Bearing Mollusca of Japan''. Elle Scientific Publications, Yao, Japan, 749 pp. External links World Register of Marine Species candida Gastropods described in 1861 {{Trochidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charisma Arenacea
''Charisma arenacea'', common name the sandy charisma, is a species of extremely small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Marshall, B. (2013). Charisma arenacea (Pritchard & Gatliff, 1902). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=720369 on 2014-03-11 Description The height of the shell attains 2 mm, its diameter also 2 mm. The small, solid, umbilicate shell has a turbinate shape. Its color is sordid white. The four to five whorls are convex. The nuclear whorls are smooth, the rest are spirally ridged. These ridges are well-developed and number about 11 to 13 around the circular aperture on the body whorl. The space between the ridges is wider than the ridges. The umbilicus is deep and extends at the back of the columella to the anterior of the aperture. It is occasionally margined by a strong thread. The base of the shell is round. The lip is thick. Distrib ... [...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 may re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Snail
Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the absence of a visible shell. Definition Determining whether some gastropods should be called sea snails is not always easy. Some species that live in brackish water (such as certain neritids) can be listed as either freshwater snails or marine snails, and some species that live at or just above the high tide level (for example species in the genus '' Truncatella'') are sometimes considered to be sea snails and sometimes listed as land snails. Anatomy Sea snails are a very large group of animals and a very diverse one. Most snails that live in salt water respire using a gill or gills; a few species, though, have a lung, are intertidal, and are active only at low tide when they can move around in the air. These air-breathing species includ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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