Alvania partimcancellata

Alvania partimcancellata
Shell of Alvania partimcancellata (holotype)
Scientific classification
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) partimcancellata Wood in Kend, et Bell, 1886 Rissoa partim-cancellata S. 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]

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.

References

1. MolluscaBase eds. (2024). MolluscaBase. Alvania partimcancellata Harmer, 1920 †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=955628 on 2024-02-07
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) This article incorporates text from this source, which is in the public domain.

• Gürs, K & F. Weinbrecht. (2001). Die Gattung Alvania (Gastropoda, Rissoidae) im norddeutschen Miozän. Meyniana. 53: 75–88.

External links

• Glibert, M. (1962). Les Mesogastropoda fossiles du Cénozoïque étranger des collections de l'Institut Royal des Sciences Naturelles de Belgique. Première partie. Cyclophoridae à Stiliferidae (inclus). Institut Royal des Sciences naturelles de Belgiques, Mémoires. Deuxième série. 69: 1-305