Species: albertensis LAMBE, 1913
Etymology: In reference to the province of Alberta in Canada.

Holotype: CMN (NMC) 344

Locality: Quarry 016, Dinosaur Provincial Park, about 1 1/2 miles southeast of Denhart Ferry, Dinosaur Provincial Park, Red Deer River, Newell County, 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: Skull and skeleton.
Note: A year later after the find of the skull, the skeleton was discovered.
Note: Pathological parietal (HOLMES, RYAN & LLYOD, 2007, TANKE & ROTHSCHILD, 2010)

Referred material:

TANKE & ROTHSCHILD, 2010

Locality: Styracosaurus bone bed (mentioned by CURRIE & DODSON, 1984), bone bed 42 (BB 42), Dinosaur Provincial Park, Dinosaur Provincial Park, Red Deer River, Newell County, 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:

RTMP 90.58.1: Dorsal neural arch with coarse pitting on the right postzygapophysis, possibly related to spondyloarthropathy.

RTMP 89.97.1: Nearly complete tail with caudals 27-30 with cheverons thoroughly fused and for a swollen mass.

= Styracosaurus parksi BROWN & SCHLAIKJER, 1937
Etymology:

Holotype: AMNH 5372

Locality: Dinosaur Provincial Park, middle fork of Sand Creek on the right bank, approximately 250 feet above the Red Deer River, 12 miles below Steveville, 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: Fragmentary skull, fragmentary dentary and a nearly complete skeleton.
Note: Paleopathology. 4 and 56th dorsal vertebrae are fused.