| Careoradula perelegans | |
|---|---|
| |
| apertural view of a shell | |
| |
| umbilical view of a shell | |
| Conservation status | |
 Endangered (IUCN 3.1) | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| (unranked): | clade Heterobranchia
clade Euthyneura |
| Superfamily: | Streptaxoidea |
| Family: | Streptaxidae |
| Subfamily: | Streptaxinae |
| Genus: | Careoradula Gerlach & van Bruggen, 1999 |
| Species: | C. perelegans |
| Binomial name | |
| Careoradula perelegans (Martens, 1898) | |
| Synonyms | |
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Careoradula perelegans is a species of air-breathing land snail, terrestrial pulmonate gastropod mollusk in the family Streptaxidae.
Careoradula perelegans is the only species in the genus Careoradula.
The generic name Careoradula consist of Latin word "careo", that means "lacking" and the word radula.
Distribution
Careoradula perelegans is endemic to the Seychelles.
Description
The shape of the shell is discoidal. The shell has 6-8 whorls. there are regular ribs on the shell. The umbilicus is open.
The width of the shell is 4.4-6.1 mm. The height of the shell is 1.9-3.1 mm.
The body color is pale yellow.
Digestive system: Careoradula perelegans is unique among other streptaxids, because it has no radula, no odontophore and no retractor muscles associated with these structures. It is the first known terrestrial mollusc and first pulmonate gastropod without radula. Instead of this, the Careoradula perelegans has strong muscular ridges between mouth and oesophagus.
Ecology
Careoradula perelegans feeds on carrion. It has been recorded to feed on dead snail Subulina octona. It evert an extensive rostrum, that is available in all carnivorous gastropods on the anterior part of the oesophagus, and it uses only muscular peristaltics instead of rasping by radula.
References
- Gerlach J. (2006). Careoradula perelegans. In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.3. <www.iucnredlist.org>. Retrieved 5 October 2010.
- ^ 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.
- 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.
- ^ 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.
- ^ 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.
| Taxon identifiers | |
|---|---|
| Careoradula perelegans | |