Thompson, M. L. (1942). New genera of Pennsylvanian fusulinids. American Journal of Science. 240(6): 403-420., available online at (https://doi.org/10.2475/ajs.240.6.403) page(s): p. 411 pl. 3 figs. 10-14 Lectotype: pl. 3 fig. 13 designated by Thompson (1948)
Thompson, M. L. (1942). New genera of Pennsylvanian fusulinids. American Journal of Science. 240(6): 403-420., available online at (https://doi.org/10.2475/ajs.240.6.403) page(s): p. 411 pl. 1 figs 15-20