Authors Year Title
King, Dunbar & Cloud 1944 Geology and Paleontology of the Permian area northwest of Las Delicias, southwestern Coahuila, Mexico. [King,R.E., Dunbar,C.O., Cloud,P. & Miller,A.K.]
Geological Society of America Special Papers, 52: X + 1-172, 29 text-figs., 45 pls.
Kullmann 1983 Maxima im Tempo der Evolution karbonischer Ammonoideen.
Paläontologische Zeitschrift, 57 (3/4): 231-240, fig.1-4, pl.1; Stuttgart.
Miller & Furnish 1940c Permian ammonoids of the Guadalupe Mountain Region and adjacent areas.
Special Papers of the Geological Society of America, 26: 1-242, fig.1-59, pl.1-44; Baltimore.
Ruzhencev 1950 Verkhnekamennougol'nye ammonity Urala.
Trudy Paleont. Inst., Akad. Nauk SSSR, 29: 1-220, fig.1-84, pl.1-15; Moskva.
White & Skorina 2000 A Type Catalog of Fossil Invertebrates (Mollusca: Ammonoidea) in the Yale Peabody Museum.
Postilla 222, Peabody Museum of Natural History, Yale University, 1-73, New Haven, CT.