	Authors	Year	Title
	Miller & Faber	1892	Description of some Subcarboniferous and Carboniferous Cephalopoda. Journal of the Cincinnati Society of natural history, 14: 164-168, pl.6;
	Smith	1903	The Carboniferous Ammonoids of America. Monography, U.S. geological Survey, 42: 1-211, pl.1-29; Washington.