Members of the genus are typically small to medium in size. The general shape of the shell is roughly circular to roughly triangular, and both valves are strongly convex in shape. The beak (the oldest portion of the valve closest to the hinge) is incurved rather than flat. The foramen (the opening through which the animal's pedicle or foot was extended) is large and oval in shape.[7]/
^Weller, S. (1910). "Internal characters of some Mississippian rhynchonelliform shells". Geological Society of America Bulletin. 21 (1): 497–516. Bibcode:1910GSAB...21..497W. doi:10.1130/GSAB-21-497.
^Williams, A.; Brunton, C. H. C.; Carlson, S. J.; Alvarez, F.; Blodgett, R. B.; Boucot, A. J.; Copper, P.; Dagys, A. S.; Grant, R. E.; Jin, Y.-G.; MacKinnon, D. I.; Mancenido, M. O.; Owen, E. F.; Rong, J.-Y.; Savage, N. M.; Sun, D.-L. (2002). Treatise on Invertebrate Paleontology H: Brachiopoda. Vol. 4. pp. 921–1688.
^ abcdWaterhouse, J. B. (1982). "New Zealand Permian brachiopod systematics, zonation, and paleoecology". New Zealand Geological Survey Paleontological Bulletin. 48: 7–158.
^Butts, Susan H. (January 2007). "Solicified carboniferous (Chesterian) Brachiopoda of the Arco Hills Formation, Idaho". Journal of Paleontology. 81 (1): 48–63. doi:10.1666/0022-3360(2007)81[48:SCCBOT]2.0.CO;2.
^ abcBrezinski, David K.; Kollar, Albert D. (15 July 2021). "Lithofacies and Fauna of the Loyalhanna Limestone (Chesterian, Upper Mississippian) and Their Implications for its Origin in the Appalachian Basin". Annals of Carnegie Museum. 87 (2). doi:10.2992/007.087.0203. S2CID237402329.
^Jin, Y. G.; Wang, Y.; Sun, D. L.; Shi, Q. (1985). "Late Paleozoic and Triassic brachiopods from the east of the Qinghai-Xizang Plateau". Paleontology and Stratigraphy of Western Sichuan and Eastern Xizang. pp. 182–249.