Alvania multistriata
| Alvania multistriata | |
|---|---|
 | |
| Shell of Alvania multistriata (holotype) | |
Scientific classification  | |
| 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 multistriata Bell, 1892 (Alvania accepted as full genus) | |
Alvania multistriata is an extinct species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.[1]
Description
[edit]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
[edit]Fossils of this species were found in Pliocene strata near Selsey, Great Britain.
References
[edit]- ↑ MolluscaBase eds. (2024). MolluscaBase. Alvania multistriata (Bell, 1892) †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1027631 on 2024-02-15
- ↑ 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.