''Pseudoliva sepimentum'' 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 Pseudolividae.MolluscaBase eds. (2022). MolluscaBase. Pseudoliva sepimentum (Rang, 1832). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=225049 on 2022-02-21

Description

The size of the shell varies between 11 mm and 22 mm. The ovate, conical shell is slightly ventricose, attenuated at summit and base, pretty solid and nearly smooth. Its ground color is bluish ash, ornamented with a deeper band upon each

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 ...

, and upon the lowest, with two others, distant, and more obvious. The epidermis is greenish. The pointed spire is composed of five or six distinct, convex whorls. The

body whorl The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk. In gastropods In gastropods, the b ...

is much larger than all the others together, presenting at the base a pretty deep decurrent suture. The aperture is whitish, ovate, elongated, and terminates at the base by a very oblique emargination, and above by a canal formed by the prolongation, upon the columella, of a callosity which becomes there a thin sharp plate. This plate presents the appearance of a partition extending towards the left lip ; the outer lip is much elongated, thin and sharp. The columella is arcuated, covered by a callosity which extends a little upon the body of the shell. From the middle arises a ridge which descends obliquely nearly to the base of the outer lip, where it terminates within by a small elevation.Kiener (1840). General species and iconography of recent shells : comprising the Massena Museum, the collection of Lamarck, the collection of the Museum of Natural History, and the recent discoveries of travellers; Boston :W.D. Ticknor,1837
(described as ''Buccinum sepimentum'')

Distribution

This marine species occurs off West Africa and Angola.

References

* Bernard, P.A. (Ed.) (1984). ''Coquillages du Gabon hells of Gabon'' Pierre A. Bernard: Libreville, Gabon. 140, 75 plates pp. * Gofas, S., Afonso, J.P. & Brandào, M. (1985). Conchas e Moluscos de Angola = Coquillages et Mollusques d'Angola. hells and molluscs of Angola Universidade Agostinho / Elf Aquitaine Angola: Angola. 140 pp. Printed without date.

External links

*
Rang, [S.
(1832). Buccin. Buccinum. B. sepimente. B.sepimentum. Rang. Magasin de Zoologie. 2: Classe V, Planche 18 ">."> Rang, [S.
(1832). Buccin. Buccinum. B. sepimente. B.sepimentum. Rang. Magasin de Zoologie. 2: Classe V, Planche 18 {{DEFAULTSORT:Pseudoliva Sepimentum Pseudolividae Gastropods described in 1832