Species: marshalli CURRIE & VARRICCHIO, 2004
Etymology: In honor of Wayne Marshall of East Coulee, Alberta, Canada, who discovered the specimen.

Holotype: RTMP 95.166.1

Locality: UTM 12U 372, 125 E, 5,708,055N, about 5 km west of the Royal Tyrrell Museum of Palaeontology, Drumheller, Alberta Province, Canada.

Horizon: Horseshoe Canyon Formation, Edmonton Group.

Biostratigraphy:

Age: Edmontonian age, Late Campanian Stage to Early Maastrichtian Stage, Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material : A partial skull that includes premaxillae, the right maxilla, the right dentary, portions of the left dentary, teeth and numerous fragments.

Referred material:

LARSON, BRINKMAN & BELL, 2010

Locality: Albertosaurus bonebed, Alberta Province, Canada.

Horizon: Horseshoe Canyon Formation, Edmonton Group.

Biostratigraphy:

Age: Early Maastrichtian Stage, Late Senonian Subepoch, Late Gulf Epoch, Late Cretaceous.

Material:

RTMP 1998.063.0004, 1999.050.0017, 2000.045.0035,2000.045.0103, 2003.045.0049, 2003.045.0052: Teeth.

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