Bembicium

(Redirected from Risella)

Bembicium is a genus of sea snails, marine gastropod mollusks in the family Littorinidae, the winkles or periwinkles.[1]

Bembicium
Bembicium melanostoma
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Family: Littorinidae
Subfamily: Lacuninae
Genus: Bembicium
Philippi, 1846
Synonyms[1]

Risella Gray, 1842

Description

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(Described as Risella) The depressed shell is trochiform, with flattened whorls and a keeled periphery. The shell is not umbilicated. The aperture is rhomboidal, marked with brown inside the margin. The operculum is paucispiral.

These shells are distinguished from Trochus, which they resemble in form and sculpture, by their non-nacreous interior. The animal is distinguished by eyes on the tentacles instead of on peduncles, and by the absence of the lateral membranes of the foot.[2]

Species

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The following species are recognised in the genus Bembicium:

References

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  1. ^ a b Bembicium Philippi, 1846. Reid, David G. (2010). Bembicium Philippi, 1846. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=205680 on 6 June 2010 .
  2. ^ Tryon (1882) Structural and systematic conchology vol. I   This article incorporates text from this source, which is in the public domain.