Williams, A., Bassett, M. G., Popov, L. E., Carlson, S. J., & Cocks, L. R. M. (2000). Part H, Brachiopoda (Revised), vol. 2 & 3, ch. 2, p. 158–349. Treatise on Invertebrate Paleontology. https://doi.org/10.17161/dt.v0i0.5207