Emarginula


Emarginula is a genus of small keyhole limpets, marine gastropod molluscs in the family Fissurellidae.

Description

The oval shell is obliquely conical with a backward-pointing recurved apex. There is a deep incision in the anterior margin. A distinct anal fasciole extends upwards from this incision. The surface is latticed, sculptured with radial ribs. There is no septum inside.

Radula

The radula has a dental formula of .1.4.1.4.1., with a wide, rectangular, acuspate rachidian tooth.
The various genera have a few dozen rows of teeth.

Species

According to the World Register of Marine Species, species within the genus Emarginula include:Emarginula adamsiana [George Brettingham George Brettingham Sowerby III|Sowerby II|Sowerby] in [Arthur Arthur Adams (zoologist)|Adams (zoologist)|Adams] & Sowerby, 1863Emarginula adriatica Costa O.G., 1829Emarginula agulhasensis [Johannes Johannes Thiele (zoologist)|Thiele (zoologist)|Thiele], 1925Emarginula alba Watson, 1897Emarginula amyda Shikama, 1962Emarginula angusta McLean, 1970Emarginula annielangleitae Poppe & Tagaro, 2020Emarginula apolonia Pacaud, 2015

Synonyms

Emarginula altilis Gould, 1859: synonym of Variemarginula punctata Emarginula amitina Iredale, 1925: synonym of Emarginula dilecta A. Adams, 1852Emarginula angustata Thiele, 1915: synonym of Tugali decussata A. Adams, 1852Emarginula arabica A. Adams, 1852: synonym of Octomarginula arabica Emarginula arconatii Issel, 1869: synonym of Montfortista panhi Emarginula australis Quoy & Gaimard, 1834: synonym of Montfortia subemarginata Emarginula bella Gabb, 1865: synonym of Scelidotoma bella Emarginula biangulata Sowerby, 1901: synonym of Emarginella biangulata