DURHAM, J. Wyatt et al. Part U, Echinodermata 3, vol. 1 & 2, ch. 1, p. 1-107. Treatise on Invertebrate Paleontology, [S. l.], 1966. DOI: 10.17161/dt.v0i0.5653. Disponível em: https://journals.ku.edu/InvertebratePaleo/article/view/5653.. Acesso em: 23 nov. 2024.