Yu-Gan, Jin, Sun Dong-Li, A. S. Dagys, D. E. Lee, M. R. Sandy, and T. N. Smirnova. “Part H, Brachiopoda (Revised), Vol. 5, Ch. 5, P. 2019–2081”. Treatise on Invertebrate Paleontology (January 1, 2006). Accessed November 23, 2024. https://journals.ku.edu/InvertebratePaleo/article/view/5577.