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Authors |
Year |
Title |
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Boardman & Work |
2004 |
Stratigraphic distribution of the ammonoids Shumardites and Vidrioceras and implications for the definition of the global Gzhelian Stage, Upper Pennsylvanian Series, Upper Pennsylvanian Series.
Newsletter on Carboniferous Stratigraphy, 22: 23-27, 2 fig.
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Miller & Unklesbay |
1943 |
The siphuncle in Late Paleozoic amonoids.
Journal of Paleontology, 17 (1): 1-25, fig.1-9, pl.1-5; Tulsa,Oklahoma.
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Miller & Downs |
1950a |
Ammonoids of the Pennsylvanian Finis Shale of Texas.
Journal of Paleontology, 24:185-218, 11 text-figs., pl.31-35.
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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.
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Popov |
1960 |
Verkhnekamennougol'nye ammonoidei Orulganskogo Khrebta.
Trudy Nauchno-Issl. Inst. Geol. Arktiki, Minist. Geol. SSSR, 1960: 82-92, fig.1-2, pl.1; Leningrad.
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Ruzhencev |
1955b |
K voprosu o proiskhozhdenii semeystva Shumarditidae.
Dokl. Akad. Nauk SSSR, 103 (6): 1107-1110, fig.1-2; Moskva.
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