''Enida'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

of sea snails, marine gastropod

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is es ...

s in the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Trochidae The Trochidae, common name top-snails or top-shells, are a family of various sized sea snails, marine gastropod molluscs in the subclass Vetigastropoda. This family is commonly known as the top-snails because in many species the shell resembles ...

, the top snails (not assigned to a subfamily).

Description

The shell has a depressed-conical shape. It is widely umbilicate. The convex

whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane flo ...

s are concentrically granose-lirate. The sutures are canaliculate. The body whorl is carinated or angulated. The

aperture In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane. An ...

is subquadrate. The outer lip is simple, or lirate within. The inner lip is reflexed. The umbilicus is large. The margin is crenulated.

Species

Species within the genus ''Enida'' include: * ''

Enida persica ''Enida persica'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. Description The height of the shell is 3 mm, its diameter 5 mm. The shell is small, solid and has a depressed conical sh ...

'' Melvill, J.C. & R. Standen, 1903 * ''

Enida japonica ''Enida japonica'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.Bouchet, P. (2012). ''Enida japonica'' A. Adams, 1860. Accessed through: World Register of Marine Species at http://www.marinespecie ...

'' A. Adams, 1860 * ''

Enida taiwanensis ''Enida taiwanensis'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. Description Distribution This marine species occurs off Southeast Asia and Taiwan Taiwan, officially the Republic of ...

'' Z.Z. Dong, 2002

References

External links

{{Taxonbar, from=Q5378900 Trochidae Gastropod genera