	Authors	Year	Title
	Miller & Garner	1955	Lower Mississippian cephalopods of Michigan. Part III. Ammonoids and summary. Contributions, Museum of Paleontology. Univ. Michigan, 12: 113-173, fig.1-16, pl.1-7; Michigan.
	Smith	1903	The Carboniferous Ammonoids of America. Monography, U.S. geological Survey, 42: 1-211, pl.1-29; Washington.