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Miller & Furnish |
1958a |
Middle Pennsylvanian Schistoceratidae (Ammonoidea).
Journal of Paleontology, 32 (2): 253-268, fig.1-9, pl.33-34; Tulsa,Oklahoma.
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Shkolin |
2001 |
Glava 5, Ammonoidei. Glava 12, Ammonoidei.
In: Alekseev,A.S & Shik,S.M.,eds.,Srednii karbon Moskovskoi sineklizy (iuzhnaia chast'). Tom 2. Paleontologicheskaia kharakteristika,77-79,172-188,18 fig.,pl.35-36.
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Unklesbay |
1962 |
Pennsylvanian Cephalopods of Oklahoma.
Bulletin of the Oklahoma Geological Survey, 96: 1-150, fig.1-16, tab.1-2, pl.1-19; Norman.
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