Moore RC, Cox LR, Trueman ER, Newell ND, Nuttall CP. Part N, Mollusca 6, vol. 1, ch. 1, p. 1–129. InvertebratePaleo [Internet]. 1969 Jan. 1 [cited 2024 Nov. 21];. Available from: https://journals.ku.edu/InvertebratePaleo/article/view/5588