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.
Gordon 1965 Carboniferous Cephalopods of Arkansas.
Professional Papers, U.S. Geological Survey, 460: 1-322, fig.1-96, pl.1-32; Washington. [imprint 1964].
Mapes & Furnish 1981 The Pennsylvanian ammonoid family Welleritidae.
Journal of Paleontology, 55 (2): 317-330, fig.1-8, pl.1-2; 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 & Furnish 1958a Middle Pennsylvanian Schistoceratidae (Ammonoidea).
Journal of Paleontology, 32 (2): 253-268, fig.1-9, pl.33-34; Tulsa,Oklahoma.
Ruzhencev 1952b Pervyy predstavitel' semeystva Welleritidae iz Srednekamennougol'nykh otlozheniy Urala.
Dokl. Akad. Nauk SSSR, 84 (1): 131-134, fig.1-2; Moskva.
Smith 1938 The cephalopod fauna of the Buckhorn Asphalt.
The University of Chicago Libraries, 1938: 1-39, pl.1-2; Chicago, Illinois.
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.