KAUFFFMAN, E. G.; NEWELL, N. D. Part N, Mollusca 6, vol. 1, ch. 2, p. 129–224. Treatise on Invertebrate Paleontology, [S. l.], 1969. DOI: 10.17161/dt.v0i0.5589. Disponível em: https://journals.ku.edu/InvertebratePaleo/article/view/5589.. Acesso em: 27 apr. 2024.