Authors Year Title
Miller & Gurley 1896 New species of Palaeozoic invertebrates from Illinois and other states.
Bulletin of the Illinois State Museum of Natural History, 11: 1-50, pl.1-5; Springfield, IL.
Ruzhencev 1936 Paleontologicheskie zametki o kamennougol'nykh i permskikh ammoneiakh. [Paleontological remarks on Carboniferous and Permian ammonoids.]
Problemy sovetskoi geologii, 12: 1072-1088, fig.1-5; Moskva.
Ruzhencev 1936 Paleontologicheskie zametki o kamennougol'nykh i permskikh ammoneiakh. [Paleontological remarks on Carboniferous and Permian ammonoids.]
Problemy sovetskoi geologii, 12: 1072-1088, fig.1-5; Moskva.
Smith 1903 The Carboniferous Ammonoids of America.
Monography, U.S. geological Survey, 42: 1-211, pl.1-29; Washington.