Harrington, H. J., J. M. Weller, B. F. Howell, H. B. Whittington, Klaus Sdzuy, Herta Schmidt, C. J. Stubblefield, et al. “Part O, Arthropoda 1, Complete Volume”. Treatise on Invertebrate Paleontology (January 1, 1959). Accessed November 21, 2024. https://journals.ku.edu/InvertebratePaleo/article/view/5609.