| Boulder snail | |
|---|---|
| Conservation status | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| (unranked): | clade Caenogastropoda clade Sorbeoconcha |
| Superfamily: | Cerithioidea |
| Family: | Pleuroceridae |
| Genus: | Athearnia |
| Species: | †A. crassa |
| Binomial name | |
| †Athearnia crassa (Haldeman, 1841) |
|
| Synonyms | |
|
Leptoxis crassa |
|
The boulder snail, scientific name †Athearnia crassa, was a species of freshwater snail, a gastropod in the family Pleuroceridae. This species was endemic to the United States, but it is now extinct.