Figures 7 - 11 from plate 30 of the University Geological Survey of Kansas, Volume VI "Paleontology part II, (Carboniferous invertebrates and Cretaceous fish), Samuel Williston, 1900
7-Squalicorax curvatus Williston 1900 Lower or lowermost Benton Horizon, Ellsworth County, Kansas, USA
8-Squalicorax curvatus Williston 1900 Lower or lowermost Benton Horizon, Ellsworth County, Kansas, USA
9-Ptychodus janewayii Cope 1874 Lower or lowermost Benton Horizon, Ellsworth County, Kansas, USA
10-Ptychodus janewayii Cope 1874 Lower or lowermost Benton Horizon, Ellsworth County, Kansas, USA
11-Ptychodus janewayii Cope 1874 Lower or lowermost Benton Horizon, Ellsworth County, Kansas, USA
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move approved by: User:Kevmin This image was moved from File:Ptychodus.jpg == Summary == {{Information |Description= Figures 7 - 11 from plate 30 of the University Geological Survey of Kansas, Volume VI "Paleontology part II, (Carboniferous inv
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