Alvania convexispira is an extinct species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.MolluscaBase eds. (2024). MolluscaBase. Alvania convexispira O. Boettger, 1907 †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1037455 on 2024-02-03
Description
The length of the shell attains 2.5 mm, and its diameter is 1.5 mm. Distribution Fossils of this marine species were found in Middle Miocene strata in Hungary.
References
External links Boettger, O. (1907). Zur Kenntnis der Fauna der mittelmiocänen Schichten von Kostej im Krassó–Szörényer Komitat (Gasteropoden und Anneliden). III. Verhandlungen und Mitteilungen des Siebenbürgischen Vereins für Naturwissenschaften zu Hermannstadt. 55 (1905): 101-244 Kovács, Z.; Stein, G. (2023). Middle Miocene Rissooidea (Caenogastropoda) of Letkés (Hungary). Földtani Közlöny. 153(1): 19-34