	Authors	Year	Title
	Miller & Furnish	1940b	Studies of Carboniferous ammonoids: parts 5-7. Journal of Paleontology, 14 (6): 521-543, fig.1-7, pl.62-65; Tulsa, Okla.
	Smith	1903	The Carboniferous Ammonoids of America. Monography, U.S. geological Survey, 42: 1-211, pl.1-29; Washington.