Amphithalamus (Amphithalamus) Carpenter 1864 (snail)
Gastropoda - Rissooidea - Barleeidae
Parent taxon: Amphithalamus according to W. F. Ponder 1983
Sister taxa: Amphithalamus (Notoscrobs), Amphithalamus immigrus, Amphithalamus inclusus, Amphithalmus (Cerostraca), Amphithalmus (Pisinna)
Subtaxa: none
Ecology: epifaunal grazer