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Authors |
Year |
Title |
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Furnish & Spinosa |
1966 |
Historic Pennsylvanian Ammonoids from Iowa.
Iowa Academy of Science, 73: 253-259, fig.1-2.
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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.
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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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Smith |
1903 |
The Carboniferous Ammonoids of America.
Monography, U.S. geological Survey, 42: 1-211, pl.1-29; Washington.
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Yang |
1987 |
Early late Carboniferous ammonoids from Zhongwei, Ningxia Autonomous Region, China. [In Chinese, with English summary].
Geoscience, 1 (2): 157-172, 20 figs., 3 pls.
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