Species: lactea FOX, 1987
Etymology:

Holotype: UALVP 22823

Locality: UALVP locality MR-6, Verdigirs Coulee, 29 km east of Milk River, Warner County, Alberta Province, Canada.

Horizon: Upper Milk River Formation.

Biostratigraphy:

Age: Aquilian age, Lower Campanian Stage, Aquilian in age, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material: Left UM2.

Hypodigm

UALVP 22824, 22826-22830:

UALVP 29676: Upper jaw fragment with associated M3 and partial M4.

 

CIFELLI, 1990

Localities: OMNH localities V6, and V9, Kane County, Utah.

Horizon: Lower Kaiparowits Formation, Late Cretaceous.

Biostratigraphy:

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

Material:

OMNH 20120: UM2.

OMNH 20160: UM2.

OMNH 20430: LP2.

OMNH 20588: LP3 (lost).

OMNH 20531: Jaw fragment with LM3.

OMNH 20612: LM4.

 

DAVIS, CIFELLI, & COHEN, 2016

Locality: OMNH V1409, Toole County, Montana.

Horizon: Deadhorse Coulee Member, Eagle Formation.

Biostratigraphy:

Age: Santonian Stage, Senonian  Subepoch, Gulf Epoch, Late Cretaceous.

Material:

OMNH 66347: Rigth MX preserving only distobuccal corner.