Genus: Eoceratops LAMBE, 1915
Etymology: Greek, eos, “dawn” and Greek, ceratops, “horn face”: “dawn horn face”.
= Mojoceratops LONGRICH 2010
Etymology: From Jono (early 20th century African-American English) a majic charm or talisman, often used to attract members of the opposite sex (in reference to the elaborate frill, which may have functioned in courtship), Greek, ceras, 'horn', and Greek, ops, 'face'.

Species: canadensis (LAMBE, 1902) LEHMAN, 1990
Etymology: In reference to the country where the specimen was found.
= Monoclonius canadensis LAMBE, 1902
= Ceratops canadensis (LAMBE, 1902) HATCHER vide STANTON & HATCHER, 1905
= Eoceratops canadensis (LAMBE, 1902) LAMBE, 1915

Holotype: NMC 1254

Locality: Dinosaur Provincial Park, A short distance below the mouth of Berry Creek, east side of 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: Nearly complete skull.

Breakdown as follows;

1254A: Right squamosal.

1254b: The right posterior lateral extension of the parietal.

1254c: The right nasal including the right half of the nasal horn-core.

1254d: The right postfrontal and prefrontal with the supraorbital horn-core.

1254e: Left dentary without teeth.

1254f: An anterior dorsal vertebra.

Note: Originally a referred specimen to Monoclonius dawsoni LAME, 1902.

Referred material :

TYSON, 1977, 1981/DANIS, 1986

Locality: Locality: Quarry 237, Dinosaur Provincial Park, 2 miles southeast and 1 mile east of the mouth of Sand Creek, Red Deer River, Dinosaur Provincial Park, 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.

Horizon: Dinosaur Park Formation, (old Judith River Formation), Campanian, Late Cretaceous.

Material:

UAVP 40: Nearly complete skull.
Note: Paleopathology, extra fontanelles in the neck frill due to resorption? (TYSON, 1977, 1981)

 

= Chasmosaurus kaiseni BROWN, 1933
Etymology: In honor of Peter C. Kaisen.

Holotype: AMNH 5401

Locality: Dinosaur Provincial Park, 12 miles below Steveville, Tp 21, R.11, 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.

Referred material:

= Chasmosaurus ?kaiseni TANKE, 2007

Locality: Dinosaur Provincial Park, 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 81.41.116: Massive orbital horncore.

= Mojoceratops perifania LONGRICH, 2010
Etymology: Greek, perifania, "pride"; in reference to the elaborate and erect parietosquamosal frill.

Holotype: RTMP 1983.25.1

Locality: Unknown, Dinosaur Provincial Park, 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: A partial skull missing the rostrum, part of the left parietal, and the right side of the face.

Referred material:

Locality: Unknown, Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Lower Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

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

Material:

RTMP 1999.55.292: Partial ramus.

 

Locality: From a bonebed along the South Saskatchewan River (now Lake Diefenbaker), Saskatchewan.

Horizon: Below the Bearpaw shale in the Dinosaur Park Formation.

Biostratigraphy:

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

Material:

NMC 8803: Partial parietals.

 

Locality: Unknown, in the vicinity of San Creek, 12 miles below Steveville, Red Deer River, Alberta Province, Canada.

Horizon: Lower Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

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

Material:

AMNH 5656: Partial skull missing rostrum and skull roof of a subadult?

 

Locality: Approximately 1 mile southeast of the ghost town of Steveville, Alberta Province, Canada.

Horizon: Lower Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

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

Material:

NMC 34893: Skull roof, postorbital horns, and squamosals.

 

= Chasmosaurus sp RYAN, RUSSELL, EBERTH & CURRIE, 2001

Locality: Centrosaurus bone bed (bone bed 43) Dinosaur Provincial Park, 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 1979.11.147: Nasals, roof of braincase, supraorbital horncores, exoccipitals and occipital condyle.