	Authors	Year	Title
	Elias	1956	Upper Mississippian and Lower Pennsylvanian Formations of south-central Oklahoma. In: Petroleum geology of southern Oklahoma. Volume 1. American Association of Petroleum Geologists, 1956: 56-134, 2 fig., 4 tab., 6 pl.; Tulsa, Okla.
	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.
	Kant	1977	Die Integrationskonstante im allometrischen Wachstum, eine konstruktionsmorphologische Analyse unter besonderer Berücksichtigung des Ammonoideen-Gehäuses. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 154 (3): 263-289, 13 fig., 2 tab., Stuttgart.
	Plummer & Scott	1937	Upper Paleozoic ammonites in Texas. The geology of Texas, vol.3 pt.1, Bull. Texas. Univ., 3701: 1-516, fig.1-88, pl.1-41; Austin, Texas.
	Ruzhencev & Bogoslovskaya	1971a	Namiurskii etap v evoliutsii ammonodei. Rannenamiurskie ammonoidei. Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR, 133: 1-382, fig.1-89, pl.1-40; Moskva.
	Saunders, Manger & Gordon	1977	Upper Mississippian and lower and middle Pennsylvanian ammonoid biostratigraphy of Northern Arkansas. Oklahoma Geolological Survey Guidebook 18: 117-137, fig.1-2, tab.1-2, pl.1-6.
	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.
	Titus & Manger	2001	Mid-Carboniferous ammonoid biostratigraphy, Southern Nye County, Nevada: Implications of the first North American Homoceras. Journal of Paleontology, 75 (4, Supplement, Memoir 55): 1-31, 24 figs., Lawrence, KS.
	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.