Species: tutus (LAMBE, 1902) LAMBE, 1910
Etymology:

Referred material:

Locality: Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

AMNH 5406: Dorsal vertebrae, ribs, scapula, humerus, ulna, radius, metacarpals, 1 phalanx, complete first half ring, and parital second half-ring, 80 scutes, and a small patch of skin impressions (PENKALSKI, 2001)