	Authors	Year	Title
	Miller	1938	Devonian ammonoids of America. Special Papers, Geological Society of America, 14: 1-262, fig.1-41, pl.1-39; Baltimore.
	Walcott	1884	Paleontology of the Eureka District. Mon. U.S. Geological Survey, 8: 1-298, pl.1-24; Washington.