HESS, Hans. Part T, Echinodermata 2 (Revised), vol. 3, ch. 1, p. 1–69. Treatise on Invertebrate Paleontology, [S. l.], 2011. DOI: 10.17161/dt.v0i0.5391. Disponível em: https://journals.ku.edu/InvertebratePaleo/article/view/5391.. Acesso em: 27 apr. 2024.