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.
Frest, Glenister & Furnish 1981 Pennsylvanian--Permian Cheiloceratacean Ammonoid Families Maximitidae and Pseudohaloritidae.
Journal of Paleontology, 55, Suppl. 3: 1-46, fig.1-19, pl.1-7; Tulsa, Okla.
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 & Downs 1950a Ammonoids of the Pennsylvanian Finis Shale of Texas.
Journal of Paleontology, 24:185-218, 11 text-figs., pl.31-35.
Miller & Furnish 1957b Permian ammonoids from Southern Arabia.
Journal of Paleontology, 31 (6): 1043-1051, fig.1-6, pl.131-132; Tulsa,Oklahoma.
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.
Tasch 1953a Causes and paleoecological significance of dwarfed fossil marine invertebrates.
Journal of Paleontology, 27 (3): 356-444, fig.1-6, pl.49; Tulsa,Oklahoma.
Tasch 1953b Nautiloids and ammonoids of the Pennsylvanian "Dry Shale Fauna".
Journal of Paleontology, 27 (3): 445-450, fig.1-3, pl.50; Tulsa,Oklahoma.
Unklesbay 1962 Pennsylvanian Cephalopods of Oklahoma.
Bulletin of the Oklahoma Geological Survey, 96: 1-150, fig.1-16, tab.1-2, pl.1-19; Norman.