Gastropoda - Architaenioglossa - Ampullinidae

Full reference: E. J. Petuch. 1997. A new gastropod fauna from an Oligocene back-reef lagoonal environment in west central Florida. The Nautilus 110(4):122-138

Belongs to Pachycrommium according to E. J. Petuch 1997

Sister taxa: Amaurellina (Pachycrommium) fahmii, Amaurellina (Pachycrommium) moradi, Pachycrommium carmenensis, Pachycrommium clarki, Pachycrommium eburnoides, Pachycrommium harrisi, Pachycrommium indicum, Pachycrommium martini, Pachycrommium nagaoi, Pachycrommium oweni, Pachycrommium saginata, Pseudocrommium gabrielensis

Type specimen: UF 75979, a shell

Ecology: epifaunal grazer

Average measurements (in mm): shell 18.0 x 13.0