Gastropoda - Sorbeoconcha - Rissoidae
Alternative spelling: Pachyrissoina
Parent taxon: Rissoina according to W. F. Ponder 1984
See also Sepkoski 2002
Sister taxa: Rissoina (Ailinzebina), Rissoina (Apataxia), Rissoina (Leaella), Rissoina (Mirarissoina), Rissoina (Parazebinella), Rissoina (Phosinella), Rissoina (Rissoina), Rissoina (Rissolina), Rissoina (Schwartziella), Rissoina (Zebinella), Rissoina albertensis, Rissoina bruguieri, Rissoina cerithiiformis, Rissoina elegantissima, Rissoina gemma, Rissoina gerasimovi, Rissoina kelseyi, Rissoina mississippiensis, Rissoina oryza, Rissoina podolica, Rissoina rakhiensis, Rissoina tennesseensis, Rissoina tenuistriata
Subtaxa: Rissoina (Pachyrissoina) walkeri
Ecology: epifaunal grazer
Distribution: there are no occurrences of Rissoina (Pachyrissoina) in the database