	Authors	Year	Title
	McCaleb	1964	Two New Genera of Lower Pennsylvanian Ammonoids from Northern Arkansas. Oklahoma Geological Notes, 24 (10): 233-237, pl.1; Norman.
	McCaleb	1968	Lower Pennsylvanian Ammonoids from the Bloyd Formation of Arkansas and Oklahoma. Special Paper of the geological Society of America, 96: 1-123, fig.1-27, pl.1-12; Boulder,Colorado.