Species: torosus RUSSELL, 1970
Etymology:

Holotype: NMC (CMN) 8506

Locality: Quarry 88 of Sternberg 1905, Near Steveville, Dinosaur Provincial Park, Alberta Province, Canada.

Horizon: Oldman Formation, middle Judith River Group.
Note: Not in the Dinosaur Park Formation.

Biostratigraphy:

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

Material: Skull and lower jaws, skeleton lacking hind limbs.
Note: Furcula.

Referred material:

cf. torosus RUSSELL, 1970

Locality: SW 1/8, sec. 20, tp. 34, rge. 21, W. 4th mer., 150 feet above the south bank of Red Deer River, near Scollard, Alberta Province, Canada.

Horizon: Horseshoe Canyon Formation, Edmonton Group.
Note: Formerly Member B of the Edmonton Formation.

Biostratigraphy:

Age: Edmontonian age, lower Maastrichtian Stage, Upper Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

CMN 11315: Scattered cranial elements, abdominal ribs, left forelimb, pelvis and hind limbs.
Note: Furcula.

Note: Juvenile/subadult.