Cladus: Eukaryota Name Careoradula Gerlach & van Bruggen, 1999: 47 Type species: Streptaxis (Imperturbatia) perelegans Martens, 1898 Reference * Gerlach, J. & A.C. van Bruggen. 1999. Streptaxidae (Mollusca: Gastropoda: Pulmonata) of the Seychelles Islands, western Indian Ocean. Zool. Verh. Leiden 328: 1-60. Careoradula perelegans is a species of air-breathing land snail, terrestrial pulmonate gastropod mollusk in the family Streptaxidae.[4][2] Careoradula perelegans is the only species in the genus Careoradula.[2] The generic name Careoradula consist of Latin word "careo", that means "lacking" and the word radula.[2] Distribution Careoradula perelegans is endemic to the Seychelles.[4][2] Description The shape of the shell is discoidal.[2] The shell has 6-8 whorls.[2] there are regular ribs on the shell.[2] The umbilicus is open.[2] The width of the shell is 4.4-6.1 mm.[2] The height of the shell is 1.9-3.1 mm.[2] The body color is pale yellow.[2] Digestive system: Careoradula perelegans is unique among other streptaxids, because it has no radula, no odontophore and no retractor muscles associated with these structures.[2][5] It is the first known terrestrial mollusc and fist pulmonate gastropod without radula.[5] Instead of this, the Careoradula perelegans has strong muscular ridges between mouth and oesophagus.[5] Ecology Careoradula perelegans feeds on carions.[5] It has been recorded to feed on dead snail Subulina octona.[5] It evert an extensive rostrum,[5] that is that is available in all carnivorous gastropods on the anterior part of the oesophagus,[5] and it uses only muscular peristaltics instead of rasping by radula.[5] References 1. ^ Gerlach J. (2006). Careoradula perelegans. In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.3. <www.iucnredlist.org>. Downloaded on 05 October 2010. Source: Wikipedia, Wikispecies: All text is available under the terms of the GNU Free Documentation License |
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