MOORE, Raymond C.; BREIMER, Albert; UBAGHS, Georges. Part T, Echinodermata 2, vol. 1-3, ch. 1, p. 1 - 216. Treatise on Invertebrate Paleontology, [S. l.], 1978. DOI: 10.17161/dt.v0i0.5642. Disponível em: https://journals.ku.edu/InvertebratePaleo/article/view/5642. Acesso em: 30 mar. 2025.