Amnicola stygius

Amnicola stygius is a species of very small aquatic snail, an operculate gastropod mollusk in the family Amnicolidae.

Description

The length of the shell attains 2.4 mm, its diameter 2.7 mm.

Distribution

The holotype was found in a stream in Tom Moore Cave, 3 miles north of Perryville, Perry County, Missouri, USA.