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Cythara (gastropod)
''Cythara'' is a genus of sea snails, marine gastropod mollusks in the family Mangeliidae. This name is considered a nomen dubium. Hedley (1922: 260) and Powell (1966: 109) summarized the arguments against using the earlier name ''Cythara'' Schumacher, 1817, with much uncertainty regarding the identity of its type species, against '' Eucythara'' Fischer, 1883. The name has also been used by European authors (e.g. Knudsen, 1952; Nordsieck, 1977) for species classified now in ''Mangelia'' Risso, 1826. Description The tropical shell is relatively large. It is columbelliform and longitudinally costellated. The spire is short. The aperture is narrow and elongated. The outer lip is denticulated within. The columellar lip is striated. The margin of the mantle is slightly dilated on the right side. The shell is fusiform, smooth and longitudinally plicated or rihbed. The aperture is linear, posteriorly subemarginate. The siphonal canal is very short and nearly straight. The columell ... [...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] |
Cythara Paucicostata
''Cythara paucicostata'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae. This species is considered a nomen dubium. Description The length of the shell attains 7 mm, its diameter 3 mm. (Original description) The wholly white shell has an oblong, ovate shape. The spire is rather short, turreted and acute. The 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 angulated at the sutures, longitudinally ribbed. There are 7 ribs, very prominent, compressed, running into the sutures. The interstices are concave, finely, regularly and closely striate transversely. The sutures are deep. Distribution This marine species occurs off Tahiti and Polynesia. References External links Tucker, J.K. 2004 ''Catalog of recent and foss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cythara Thetis
''Cythara thetis'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae. This species is considered a nomen dubium In binomial nomenclature, a ''nomen dubium'' (Latin for "doubtful name", plural ''nomina dubia'') is a scientific name that is of unknown or doubtful application. Zoology In case of a ''nomen dubium'' it may be impossible to determine whether a s .... Description Distribution This marine species was found off Port Alfred, South Africa. References * Turton, William Harry. ''The marine shells of Port Alfred, S. Africa''. H. Milford, Oxford University Press, 1932. External links Tucker, J.K. 2004 ''Catalog of recent and fossil turrids (Mollusca: Gastropoda)''. Zootaxa 682: 1–1295 {{DEFAULTSORT:Cythara thetis Endemic molluscs of South Africa thetis Gastropods described in 1932 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cythara Thapsiae
''Cythara thapsiae'' is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.Gofas, S. (2010). Cythara thapsiae Oberling, 1970. In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=433482 on 2017-04-26 This species is considered a nomen dubium In binomial nomenclature, a ''nomen dubium'' (Latin for "doubtful name", plural ''nomina dubia'') is a scientific name that is of unknown or doubtful application. Zoology In case of a ''nomen dubium'' it may be impossible to determine whether a s .... Description Distribution This marine species was found off Sicily, Italy. References * Oberling, Jean-Jacques. ''Quelques especes nouvelles de Gastéropodes du bassin Méditerranéen''. Naturhistorisches Museum, 1970. External links Tucker, J.K. 2004 ''Catalog of recent and fossil turrids (Mollusca: Gastropoda)''. Zootaxa 682: 1–1295 {{DEFAULTSORT:Cythara Thapsiae thaps ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cythara Striata
''Cythara striata'' is a species of sea snail, a marine gastropod mollusk in the family (biology), family Mangeliidae.Bouchet, P. (2012). ''Cythara striata'' Schumacher, 1817. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=578273 on 2012-12-28 This species is considered a nomen dubium. Description The length of the shell varies between 15 mm and 20 mm. The color of the shell is light yellowish brown, or yellowish white, banded narrowly and numerously with chestnut. (described as ''Mangilia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
