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Alvania densecostata

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Species of gastropod

Alvania densecostata
Shell of Alvania densecostata (holotype)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Family: Rissoidae
Genus: Alvania
Species: †A. densecostata
Binomial name
†Alvania densecostata
Harmer, 1920
Synonyms

† Rissoa densecostata A. Bell, 1893

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

Description

The length of the shell attains 3 mm, its diameter 1 mm.

(Original description) The solid, minute shell is elongate-turreted. The whorls are convex. They are ornamented by numerous fine, nearly straight ribs, crowded closely together, intersected by spiral striae which become stronger and more prominent below the periphery.

Distribution

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

References

  1. MolluscaBase eds. (2024). MolluscaBase. Alvania densecostata Harmer, 1920 †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1027565 on 2024-02-06
  2. Harmer F. W. (1920-1925). The Pliocene Mollusca of Great Britain, being supplementary to S.V. Wood's monograph of the Crag Mollusca. Vol. 2. Monographs of the Palaeontographical Society. 72(344): 485-652, pl. 45-52 (part 1, December 1920); 73(346): 653-704, pl. 53-56 (part 2, July 1921); 75(352): 705-856, pl. 57-64 (part 3, December 1923); 76(354): i-xiv, 857-900, pl. 65 (part 4, January 1925)Public Domain This article incorporates text from this source, which is in the public domain.
Taxon identifiers
Alvania densecostata


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