ESTES, BERBERIAN & MESZOELY, 1969

Locality: Bug Hills Anthills, McCone County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

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

Material:

MCZ 3514: Disarticulated skull elements and skull fragments.
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Undescribed genus and species 2 ESTES, BERBERIAN & MESZOELY, 1969

Locality: Bug Hills Anthills, McCone County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

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

Material:

MCZ 3515-3518: Isolated maxillae.

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HUTCHISON & HOLROYD, 2003

Locality: UCM locality 78193, Denver Basin, Colorado.

Horizon: Denver Formation, D1 sequence.

Biostratigraphy:

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

Material:

DMNH localty 45124: Distal half of nuchal.