Authors Year Title
Davis & Mapes 1996 Fossils of Ohio. Phylum Mollusca, Class Cephalopoda.
Ohio Division of Geological Survey, Bulletin 70, Fossils of Ohio, Chapter 14: 166-195, Fig.14-1 - Fig.14-10, Columbus, OH.
Davis, Mapes & Klofak 1999 Epizoa on externally shelled cephalopods.
In: Rozanov,A.Yu. & Shevyrev,A.A. (eds.), Fossil cephalopods: Recent advances in their study, Ross.Akad.Nauk, Paleont.Inst.: 32-51, 5 pls., Moskva.
Kullmann & Ramovs 1980 Cephalopoden aus dem Oberkarbon (Gzhelium) und Unterperm der Karawanken.
Geologica at Palaeontologica, 14: 195-208, fig.1-5, pl.1-2; Marburg.
Mapes, Windle & Sturgeon 1997 Pennsylvanian Cephalopods of Ohio. Part 2. Ammonoid Cephalopods.  [Mapes, R.H., Windle, D.L., Sturgeon, M.T. & Hoare, R.D., 1997.]
Ohio Division of Geological Survey, Bulletin 71: 193-260, 7 pls., 32 figs., Columbus, OH.
Miller 1931 Two new genera of Late Paleozoic cephalopods from Central Asia.
American Journal of Science, 5th Series, Volume 22: 417-425 fig.1-7; New Haven, Conn.
Miller & Cline 1934 The cephalopod fauna from the Pennsylvanian Nellie Bly Formation of Oklahoma.
Journal of Paleontology, 8 (2): 171-185, pl.28; Tulsa, Oklahoma.