Boulder Snail
Athearnia crassa
Athearnia crassa, the boulder snail, was a species of freshwater snail in the family Pleuroceridae. It was native to the United States, where it was known from Alabama, Georgia, Tennessee, and Virginia. It is now extinct.
From the article Athearnia crassa on Wikipedia (CC BY-SA), quoted section by section
Description
(Original description) The shell is either conical or globose in shape and possesses a ponderous structure. It consists of five whorls, which are either flat or slightly convex. The spire is notably exserted, and the aperture is ovate, featuring a well-marked columellar notch. The outer lip is thick, and the overall color of the shell is brown. The specimen typically reaches a length of 3 inches (76.2 mm) and its habitat is the Clinch River in Tennessee. This species differs from Anculosa praerosa (Say, 1821) (synonym of Leptoxis praerosa (Say, 1821) by its more highly developed spire and its more distinct notch.
Range & habitat
It was native to the United States, where it was known from Alabama, Georgia, Tennessee, and Virginia. It is now extinct.
Wikipedia: “Distribution”
Where it lives
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
Drag the globe to turn it. Dots are where records exist, not a range map; darker means more records.
In the stacks
Searching the stacks…
Every page naming Athearnia crassa in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 94785.