Alvania partimcancellata

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Alvania partimcancellata
Alvania partimcancellata 001.jpg
Shell of Alvania partimcancellata (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. partimcancellata
Binomial name
†Alvania partimcancellata
Harmer, 1920
Synonyms
  • Alvania (Arsenia) partimcancellataWood in Kend, et Bell, 1886
  • Rissoa partim-cancellataS. V. Wood in Kendall and R. G. Bell, 1886

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

Contents

Description

The length of the shell is 3 mm (0.12 in), and its diameter is 1.5 mm (0.059 in).

(Original description) The minute shell is ovate. It contains 5 slightly convex whorls. They are regularly diminishing in size upwards, the body whorl much the largest. The spire measures about one-third the total length. They are ornamented by numerous longitudinal ribs, disappearing towards the periphery against a series of spiral ridges which continue to the base of the shell, with a single line near the suture. The suture is slightly channelled. The aperture is oval. [2]

Distribution

Fossils of this species were found in late Pliocene strata at St. Erth, Cornwall, Great Britain.

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References

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