Alvania urgonensis

Alvania urgonensis 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 3.5 mm, its diameter 1.25 mm.

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