Sylvester-Bradley, P. C., R. A. Reyment, R. H. Shaver, R. V. Kesling, John Wainwright, I. G. Sohn, W. A. van den Bold, et al. “Part Q, Arthropoda 3, Ch. 2, P. 99-179”. Treatise on Invertebrate Paleontology (January 1, 1961). Accessed May 3, 2024. https://journals.ku.edu/InvertebratePaleo/article/view/5620.