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Careoradula perelegans

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Gastropodae
Subclassis: Orthogastropoda
Superordo: Heterobranchia
Ordo: Pulmonata
Subordo: Eupulmonata
Clade: Stylommatophora
Cladus: Orthurethra
Informal group: Sigmurethra
Superfamilia: Streptaxoidea
Familia: Streptaxidae
Subfamilia: Streptaxinae
Genus: Careoradula
Species: C. perelegans

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.
2. ^ a b c d e f g h i j k l m n Gerlach J. & Bruggen A. C. van (1999). "Streptaxidae Mollusca: Gastropoda: Pulmonata) of the Seychelles Islands, western Indian Ocean". Zoologische Verhandelingen 328: 1-60. page 47. abstract, PDF.
3. ^ Martens E. von & Wiegmann F. (1898). "Land- und Süsswasser-Mollusken der Seychellen nach den Sammlungen von Dr. Aug. Brauer". Mitteilungen aus der Zoologischen Sammlung des Museums für Naturkunde in Berlin 1: 1-94. page 12-13, plate 2, figure 6.
4. ^ a b Sutcharit C., Naggs F., Wade C. M., Fontanilla I. & Panha S. (2010). "The new family Diapheridae, a new species of Diaphera Albers from Thailand, and the position of the Diapheridae within a molecular phylogeny of the Streptaxoidea (Pulmonata: Stylommatophora)". Zoological Journal of the Linnean Society 160: 1-16. doi:10.1111/j.1096-3642.2009.00598.x.
5. ^ a b c d e f g h Gerlach J. & van Bruggen A. C. (1998). "A first record of a terrestrial mollusc without a radula". Journal of Molluscan Studies 64(2): 249-250. doi:10.1093/mollus/64.2.249.

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Source: Wikipedia, Wikispecies: All text is available under the terms of the GNU Free Documentation License