Authors Year Title
Bogoslovskaya 1990 Osnovye puti razvitiya i klassifikatsiya pozdnepaleozoyskikh ammonoidey Marathonitaceae i Cyclolobaceae.
Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR, 243: 70-86, fig.1-3; Moskva.
Davis, Furnish & Glenister 1969 Mature Modification and Dimorphism in late Paleozoic Ammonoids.
In: Westermann,G.E.G:Sexual Dimorphism in Fossil Metazoa and Taxonomic Implications,Intern.Union Geol.Sci., A (1):101-110, 2 figs., pl.2-5, Stuttgart.
Davis 1972 Mature modifications and dimorphism in selected Late Paleozoic ammonoids.
Bulletins of American Paleontology, 62 (272): 27-130, pls.3-21, Ithaca, NY.
Davis, Landman & Dommergues 1996 Mature Modifications and Dimorphism in Ammonoid Cephalopods. [Davis,R.A., Landman, N.H., Dommergues, D.M., Marchand, D. & Bucher, H.]
In: Ammonoid Paleobiology, N.H.Landman, K.Tanabe & R.A.Davis [eds.], 463-539, 15 figs, 1 tabl., New York (Plenum).
Girty 1908 The Guadalupian Fauna.
Professional Papers, U.S. Geological Survey, 58: 1-651, pl.1-31; Washington.
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.
Miller & Unklesbay 1943 The siphuncle in Late Paleozoic amonoids.
Journal of Paleontology, 17 (1): 1-25, fig.1-9, pl.1-5; 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.
Ruzhencev 1955a O semeystve Cyclolobidae Zittel.
Dokl. Akad. Nauk SSSR, 103 (4): 701-703, fig.1; Moskva.
Zhao 1980 Origin, classification, evolution and distribution of the family Cyclolobidae.
Acta Paleontologica Sinica, 19 (2): 79-90, fig.1-5, tab.1-2; Beijing.