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Ruzhencev & Bogoslovskaya |
1971a |
Namiurskii etap v evoliutsii ammonodei. Rannenamiurskie ammonoidei.
Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR, 133: 1-382, fig.1-89, pl.1-40; Moskva.
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Titus & Manger |
2001 |
Mid-Carboniferous ammonoid biostratigraphy, Southern Nye County, Nevada: Implications of the first North American Homoceras.
Journal of Paleontology, 75 (4, Supplement, Memoir 55): 1-31, 24 figs., Lawrence, KS.
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