Amblychilepas omicron

Amblychilepas omicron
Shell of Amblychilepas omicron (specimen in the Natural History Museum, London)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Lepetellida
Family:	Fissurellidae
Genus:	Amblychilepas
Species:	A. omicron
Binomial name
Amblychilepas omicron (Crosse & P. Fischer, 1864)
Synonyms
Fissurella omicron (Crosse & P. Fischer, 1864) (superseded combination)

Amblychilepas omicron, common name the oblong keyhole limpet, is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets.[1]

Description

The size of the shell varies between 9.3 mm and 12.6 mm.

(Original description in French) The shell is oval and flattened, featuring radiating ribs that are crossed by fine concentric striations. These striations are most prominent near the apex, lending the shell a granular texture in that area. The spaces between the ribs are intricately furrowed with numerous additional radiating striations. Inside, the shell is smooth, glossy, and bluish-white. Its edge is clean and sharp, while the central fissure is oval in shape and bordered on the interior. [2]

Distribution

This marine species is endemic to Australia and occurs off South Australia, Tasmania, Victoria and Western Australia .

References

1. Amblychilepas omicron(Crosse & P. Fischer, 1864). 14 January 2025. Retrieved through: World Register of Marine Species.
2. Crosse, H. & Fischer, P. ( (1865). "Description d'espèces nouvelles de l'Australie méridionale". Journal de Conchyliologie. 13 (1): 41. Retrieved 14 January 2025. This article incorporates text from this source, which is in the public domain.

• Cotton, B.C. (1959). South Australian Mollusca. Archaeogastropoda. Handbook of the Flora and Fauna of South Australia. Adelaide: South Australian Government Printer. pp. 1–449.
• Wilson, B. (1993). Australian marine shells. Prosobranch gastropods. Kallaroo, W.A.: Odyssey Publishing. pp. 1–408.