Sp
BRAYNT, 1990
Locality: Northeastern Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, Upper Senonian subepoch, Upper Upper Gulf epoch, Late Cretaceous.
Material:
UCMP 123524: Atlas.
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HOLYROD & HUTCHISON, 2002
Locality: V 86076, western North Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.
Material:
177882:
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