Gastropoda - Rissooidea - Barleeidae

Alternative spelling: Pisinna

Parent taxon: Amphithalmus according to H. S. Ladd 1966

Sister taxa: Amphithalamus (Amphithalamus), Amphithalamus (Notoscrobs), Amphithalamus immigrus, Amphithalamus inclusus, Amphithalmus (Cerostraca)

Subtaxa: none

Ecology: epifaunal grazer