RASMUSSEN, H. Wienberg; JEFFORDS, Russell M. Part T, Echinodermata 2, vol. 1-3, ch. 8, p. 813 - 937. Treatise on Invertebrate Paleontology, [S. l.], 1978. DOI: 10.17161/dt.v0i0.5649. Disponível em: https://journals.ku.edu/InvertebratePaleo/article/view/5649. Acesso em: 30 mar. 2025.