Species: donnae SLOAN & VAN VALEN, 1965
Etymology:

Holotype: SPSM 62-2028

Locality: Bug Creek Anthills, Western McCone County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

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

Material: Left mandible with P2-M3.

Referred material:

FOX, 1989

Locality: Long Fall, MNBT Quarry, Saskatchewan Province, Canada.

Horizon: Frenchman Formation.

Biostratigraphy:

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

Material:

UALVP 16050: LM2.

UALVP 15149: LM3.

UALVP 16049: UMx.

UALVP 22806: LM2.

UALVP 22807: LM2.

UALVP 22808: UM3.

 

LUPTON, GABRIEL & WEST, 1980

Locality: MPM Locality 2256, Chris's bonebed, McCone County, Wyoming.

Horizon: Hell Creek Formation.

Biostratigraphy:

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

Material:

MPM 4445: Fragmentary dentary with 3 molars.

MPM 4446: Fragment of dentary with 2 molars and 1 fragmentary molar.

 

Locality: MPM locality 2258, approximately 20 m Bug Creek Anthills, McCone County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

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

Material:

MPM 4801: Fragment of dentary with 3 molars.

MPM 4802:

 

cf. P. donnae JOHNSTON & FOX, 1984

Locality: MHBT Quarry, near the village of Ravenscrag, Saskatchewan, Canada.

Horizon: Lower Ravenscrag Formation.

Biostratigraphy:

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

Material:

UA 16049: M2.

UA 16050: m2.

UA 15149: m3.

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Species: coombsi ARCHIBALD, ZHANG, HARPER & CIFELLI, 2011
Etymology: In honor of Walter P. Coombs, discoverer of the Spigot-Bottle locality.

Holotype: OMNH 64985

Locality: Spigot-Bottle locality, Carter County, Montana.
Note: Exact locality data are available from the authors.

Horizon: Hell Creek Formation.

Biostratigraphy:

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

Material: Last left upper permolar.