Alvania multistriata

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Alvania multistriata
Alvania multistriata 001.jpg
Shell of Alvania multistriata (holotype)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Superfamily: Rissooidea
Family: Rissoidae
Genus: Alvania
Species:
†A. multistriata
Binomial name
†Alvania multistriata
(Bell, 1892)
Synonyms

† Rissoa multistriataBell, 1892 (Alvania accepted as full genus)

Contents

Alvania multistriata is an extinct species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae. [1]

Description

The length of the shell attains 3 mm, its diameter 1.5 mm.

The minute shell has a conical shape, rapidly tapering. It contains 5 convex whorls, the last more than half the total length. it is ornamented by well-marked, closely set spiral ridges, and the lower whorls and the upper part of the last by rather swollen ribs which do not extend far below the suture. The aperture is oval. The outer and inner lip are thin. The umbilicus is minute but deep. [2]

Distribution

Fossils of this species were found in Pliocene strata near Selsey, Great Britain.

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References

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