Williams, Alwyn, C. C. Emig, Derek Walton, Maggie Cusack, J. R. Richardson, A. D. Ansell, G. B. Curry, et al. 1997. “Part H, Brachiopoda (Revised), Vol. 1, Complete Volume”. Treatise on Invertebrate Paleontology, January. https://doi.org/10.17161/dt.v0i0.5560.