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Authors |
Year |
Title |
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Manger & Quinn |
1972 |
Carboniferous dimorphoceratid ammonoids from northern Arkansas.
Journal of Paleontology, 46: 303-314, fig.1-4, pl.1-2; Tulsa, Okla.
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Manger & Saunders |
1980 |
Lower Pennsylvanian (Morrowan) ammonoids from the North American midcontinent.
Journal of Paleontology, 54, Suppl.(3): 1-56, fig.1-21, pl.1-6, tab.1-10; Tulsa, Okla.
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Quinn |
1965 |
Reevaluation of Pygmaeoceras.
Oklahoma Geology Notes, 25 (8): 228-236, fig.1-4; Norman.
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Saunders, Manger & Gordon |
1977 |
Upper Mississippian and lower and middle Pennsylvanian ammonoid biostratigraphy of Northern Arkansas.
Oklahoma Geolological Survey Guidebook 18: 117-137, fig.1-2, tab.1-2, pl.1-6.
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