''Skenea trochoides'' is a species of

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

, a marine

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk in the family

Skeneidae The Skeneidae are a speciose family of minute to small marine gastropod molluscs in the superfamily Trochoidea.Bouchet, P.; Gofas, S. (2013). Skeneidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php ...

G.W. Tryon George Washington Tryon Jr. (20 May 1838 – 5 February 1888) was an American malacologist who worked at the Academy of Natural Sciences in Philadelphia. Biography George Washington Tryon was the son of Edward K. Tryon and Adeline Savid ...

thought this species was a synonym of ''Cyclostrema peterseni'' Frielle, 1877 (now a synonym of ''

Skenea peterseni ''Skenea peterseni'' is a species of sea snail, a marine gastropod mollusk in the family Skeneidae. Description (Original description by Herman Friele) The height of the shell attains 2.5 mm, its diameter 2.3 mm. The shell has a somew ...

'' (Friele, 1877))

Description

The size of the shell varies between 2 mm and 3 mm. The white shell is perforate, somewhat solid. It is opaque, smooth, and shining. The base of the shell contains sometimes a few faint oblique, curved lines;. The four

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 floral ...

s are convex and have a deep suture. The columellar lip is vertical, forming a slight angle with the outer lip at their junction.G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia
(described as ''Cyclostrema trochoides'')

Distribution

This species occurs in Arctic waters and in the northern Atlantic Ocean off Greenland, the

Faroes The Faroe Islands ( ), or simply the Faroes ( fo, Føroyar ; da, Færøerne ), are a North Atlantic island group and an autonomous territory of the Kingdom of Denmark. They are located north-northwest of Scotland, and about halfway betw ...

and Scandinavia at depths between 60 m and 160 m.

References

* Friele H. , 1876: ''Bidrag til Vestlandets Molluskfauna''; Forhandlinger i Videnskabs-selskabet i Christiania 1875: 57–64 * Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). ''European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification''. Collection Patrimoines Naturels, 50: pp. 180–213

External links

* {{DEFAULTSORT:Skenea Trochoides trochoides Gastropods described in 1876