Biology:Careoradula
Careoradula perelegans is a species of air-breathing land snail, terrestrial pulmonate gastropod mollusk in the family Streptaxidae.[1][2]
Careoradula perelegans is the only species in the genus Careoradula.[1][3]
The generic name Careoradula consist of Latin word "careo", that means "lacking" and the word radula.[1]
Distribution
Careoradula perelegans is endemic to the Seychelles.[1][2]
Description
The shape of the shell is discoidal.[1] The shell has 6-8 whorls.[1] there are regular ribs on the shell.[1] The umbilicus is open.[1]
The width of the shell is 4.4-6.1 mm.[1] The height of the shell is 1.9-3.1 mm.[1]
The body color is pale yellow.[1]
Digestive system: Careoradula perelegans is unique among other streptaxids, because it has no radula, no odontophore and no retractor muscles associated with these structures.[1][4] It is the first known terrestrial mollusc and first pulmonate gastropod without radula.[4] Instead of this, the Careoradula perelegans has strong muscular ridges between mouth and oesophagus.[4]
Ecology
Careoradula perelegans feeds on carrion.[4] It has been recorded to feed on dead snail Subulina octona.[4] It evert an extensive rostrum,[4] that is available in all carnivorous gastropods on the anterior part of the oesophagus,[4] and it uses only muscular peristaltics instead of rasping by radula.[4]
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 Cite error: Invalid
<ref>tag; no text was provided for refs namedGerlach 1999 - ↑ 2.0 2.1 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.
- ↑ "Careoradula Gerlach & van Bruggen, 1999". MolluscaBase. World Register of Marine Species. 2026. http://www.marinespecies.org/aphia.php?p=taxdetails&id=996795.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 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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