	Authors	Year	Title
	Miller & Gurley	1896	New species of Palaeozoic invertebrates from Illinois and other states. Bulletin of the Illinois State Museum of Natural History, 11: 1-50, pl.1-5; Springfield, IL.
	Miller & Collinson	1951	Lower Mississippian ammonoids of Missouri. Journal of Paleontology, 25: 454-487, fig.1-14, pl.68-71; Tulsa, Oklahoma.