ARCHIBALD, 1982

Locality: UCMP V72208, Lead Slug Hill 1, Garfield County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

UCMP 110626: Worn LP4.

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ARMSTRONG-ZIEGLER, 1978

Locality: San Juan Basin, New Mexico.

Horizon: Fruitland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

Number: Not given:

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NELSON & CROOKS, 1987

Locality: Rough Road Quarry, Emery County, Utah.

Horizon: Member? Cedar Mountain Formation.

Biostratigraphy:

Age: Age?, Stage?, Upper Gallic subepoch, Lowest Gulf Epoch, Late Early to Early Middle Cretaceous.

Material:

Number: Not given: UM2.