Alvania urgonensis

Alvania urgonensis
Shell of Alvania urgonensis (holotype)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Superfamily:	Rissooidea
Family:	Rissoidae
Genus:	Alvania
Species:	†A. urgonensis
Binomial name
†Alvania urgonensis Cossmann, 1918

Alvania urgonensis 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 3.5 mm, its diameter 1.25 mm.

Distribution

Fossils of this species were in Barremian strata (Cretaceous) near Orgon, southern France.

References

1. MolluscaBase eds. (2024). MolluscaBase. Alvania urgonensis Cossmann, 1918 †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=866085 on 2024-02-18

External links

• Cossmann, M. (1918). Les coquilles des calcaires d'Orgon (B.-du-R.). Bulletin de la Société Géologique de France, quatrième série.
• Cossmann, M. (1921). Essais de paléoconchologie comparée. Douzième livraison. Paris: [the author]. 349 pp., plates A-D, 1-6