	Authors	Year	Title
	Gordon	1964	California Carboniferous Cephalopods. Geological Survey Professional Paper 483-A: A1-A27, 12 figs., pl.1-4, Washington.
	Gordon	1965	Carboniferous Cephalopods of Arkansas. Professional Papers, U.S. Geological Survey, 460: 1-322, fig.1-96, pl.1-32; Washington. [imprint 1964].
	Kant	1975	Biometrische Untersuchungen an Ammonoideen-Gehäusen. Paläontologische Zeitschrift: 203-220, 19 fig., Stuttgart.
	Miller & Furnish	1940a	Studies on Carboniferous ammonoids: parts 1-4. Journal of Paleontology, 14: 356-377, fig.1-17, pl.45-49; Tulsa, Okla.
	Miller & Youngquist	1948	The cephalopod fauna of the Mississippian Barnett Formation of Central Texas. Journal of Paleontology, 22: 649-671, fig.1-3, pl.94-100; Tulsa, Okla.
	Sheng	1987	Carboniferous ammonoids from the Jingyuan district, Gansu. Bull. Inst. Geol., Chinese Acad. Geol. Sci., 16: 143-193, fig.1-29, pl.1-5; Beijing.
	Titus	2000	Late Mississippian (Arnsbergian Stage-E2 chronozone) ammonoid paleontology and biostratigraphy of the Antler foreland basin, California, Nevada, Utah. Bulletin 131 Utah Geological Survey, 1-108, 51 text-figs., 17 tabls., 16 pls., Salt Lake City.
	Youngquist	1949a	The cephalopod fauna of the White Pine shale of Nevada. Journal of Paleontology, 23: 276-305, fig.1-3, pl.59-64; Tulsa, Okla.