Lane NG, Moore RC, Robison RA, Jeffords RM, Strimple HL, Fay RO, et al. Part T, Echinodermata 2, vol. 1-3, ch. 3, p. 317 - 401. InvertebratePaleo [Internet]. 1978 Jan. 1 [cited 2024 May 5];. Available from: https://journals.ku.edu/InvertebratePaleo/article/view/5644