KNIGHT, J. Brookes; KEEN, A. Myra; YOCHELSON, E. L.; COX, L. R.; ROBERTSON, Robert; BATTEN, R. L. Part I, Mollusca 1, ch. 3, p. 185-311. Treatise on Invertebrate Paleontology, [S. l.], 1960. DOI: 10.17161/dt.v0i0.5585. Disponível em: https://journals.ku.edu/InvertebratePaleo/article/view/5585.. Acesso em: 27 apr. 2024.