	Authors	Year	Title
	Miller & Warren	1933	A Propinacoceras from North America. American Journal of Science, 153: 295-299, fig.1-4; New Haven.
	Miller & Warren	1936	A Timanites from Upper Devonian beds of America. Journal of Paleontology, 10: 632-636, fig.1-7; Menasha, Wisc.