Wilde, G. L. (2006). Pennsylvanian-Permian Fusilinaceans of the Big Hatchet Mountains, New Mexico. New Mexico Museum of Natural History and Science, Bulletin. 38: 1-331., available online at (https://books.google.pt/books?id=fLLECQAAQBAJ) page(s): p. 36, pl. 7, figs. 10-15 (holotype fig. 10 x 40, 11 x 20, 15 enlarged portion x 100).