Species: mccabei WU, BRINKMAN & P. RUSSELL, 1996
Etymology: A patronym erected in honour of Mr. James Ross McCabe who found,
collected and prepared the specimen.
Holotype: RTMP 86.61.1
Locality: Quarry L1524 (NE 1/4, LD11 S3 T30 R21W 04), about 8 km north-west of the Royal Tyrrell Museum of Paleontology at Drumheller, Wheatland County, southern Alberta Province, Canada.
Horizon: Horseshoe Canyon Formation, Edmonton Group.
Biostratigraphy:
Age: Edmontonian age, lower Maastrichtian Stage, Upper Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: A skeleton including an almost complete skull with mandibles lacking
articulars and coronoids, partial postcranium and many osteoderms.