	Authors	Year	Title
	Gabb	1862	Descriptions of new species of American Tertiary fossils and a new Carboniferous cephalopod from Texas. Proceedings, Academy of Natural Sciences Philadelphia, 1861: 367-372.
	Gordon	1960	Some American Midcontinent Carboniferous Cephalopods. Journal of Paleontology 34: 133-151, pls.27,28, 3 text-figs.,Tulsa, OK.