Hessler RH, Moore RC, Tasch P, Palmer AR. Part R, Arthropoda 4, vol. 1 & 2, ch. 2, p. 120-206. InvertebratePaleo [Internet]. 1969 Jan. 1 [cited 2024 May 5];. Available from: https://journals.ku.edu/InvertebratePaleo/article/view/5627