Untitled Document

Genus: Chasmosaurus LAMBE, 1914
Etymology: Greek, chasma, “wide opening, chasm” and Greek, sauros, “lizard”: “opening lizard”.
= Chamosaurus STERNBERG, 1940 (sic)
= Chasamosaurus STERNBERG, 1932 (sic)
= Chasmatosaurus MARYANSKA & OSMOLSKA, 1979/HAUGHTON, 1924 (sic)
= Eoceratops LAMBE, 1915
Etymology: Greek, eos, “dawn” and Greek, ceratops, “horn face”: “dawn horn face”.
= Mojoceratops LONGRICH 2010
Etymology: Mojo, from Jono (early 20th century African-American English) a magic 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."
= Protorosaurus LAMBE, 1914/ MEYER, 1830
Etymology: Greek, pro-, “before” + Torosaurus: “before Torosaurus”.

Species: belli (LAMBE, 1902) LAMBE, 1914
Etymology: In honor of Dr. Robert Bell, the administrative head of the Geological Survey.
= Monoclonius belli LAMBE, 1902
= Ceratops belli (LAMBE, 1902) HATCHER vide STANTON & HATCHER, 1905
= Protorosaurus belli (LAMBE, 1902) LAMBE, 1914

Holotype: CMN (NMC) 0491

Locality: Dinosaur Provincial Park, near the mouth of Berry Creek, Steveville, on the east side of the Red Deer River, Newell County, 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: Coalesced parietals.

Paratype

Victoria Memorial Museum, NMC 2245

Locality: Quarry 037, Dinosaur Provincial Park, NE, 1/4, Sec. 16, T21, R12, W of the 4th principal meridian, about 3 1/2 miles south of Steveville, 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 jaws except left side, anterior half of maxillae, nasals, premaxillae, rostrum and predentary, complete series of presacral vertebrae, sacrum, 24 caudal vertebrae, complete series of ribs, except 6 cervicals, three dorsals and portions of some others, pectoral arch except right coracoid, and distal end of right scapula, sternal bones, pelvic arch, both humeri, left ulna, both femora, right tibia and fibula, 6 metatarsals, 13 phalanges and 5 chevrons with skin impressions.

Referred material:

GODFREY & HOLMES, 1995

NMC 1254:

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:

AMNH 5401: Skull.

CURRIE & RUSSELL, 2005

AMNH 5422: Skull.

CURRIE, HOLMES, RYAN & COY, 2016

Locality: Quarry Q255, northeastern part of Dinosaur Provincial Park, ewell County, Alberta Province, Canada.

Note; Detaled locality on file at the University of Alberta and the Royal Tyrrell Museum of Paleontology for qualified researchers.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

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

Material:

UALVP 52613: A nearly complete skull and skeleton, lacking only portions of the circumorbital region on the right side of the skull and front limbs and girdles, with the exception of the distal half of the left scapula.

LULL, 1933

Locality: From the banks of Sand Creek, 12 miles below Steveville, Red Deer River, Alberta Province, Canada.

Horizon: Judith River Formation.

Biostratigraphy:

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

Material:

AMNH 5422: Postorbitals, premaxilla, right maxilla, left dentary, palatal bones, dorsal and caudal vertebrae, ribs, humerus, ilium, pubis, ischium, femur, tibia, fibula, and metatarsals.

Locality: Quarry 019, Dinosaur Provincial Park, 2 miles south of Steveville, on the southeast side of the 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:

ROM 5499 (renumbered 843): Skull and complete skeleton.
Note: Paleopathology, frill has an extra ‘hole’ (TANKE & FARKE, 2003, 2006), right and left mani are pathologic (REGA & HOLMES, 2006), and rib pathologies (TANKE & ROTHSCHILD, 2010).

After Godfrey & Holmes, 1995.

MAIDMENT & BARRETT, 2011

Locality: BB 78, 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:

NHMUK R4948: Fragmentary skull and fragmentary skeleton.

= Chasmosaurus brevirostris LULL, 1933
Etymology: Latin, brevis, "short" and Latin, rostrum, "snout."

Holotype: ROM 839 (formerly ROM 5436)

Locality: Quarry 025, Dinosaur Provincial Park, 3 miles south of Steveville, on the west side of the 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.

Material: Skull and part of skeleton.
Note: Squamosal fenestra (TANKE & FARKE, 2006)
Note: Sent to Buenos Aires.

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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.

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Species:? russelli STERNBEG, 1940
Etymology: In honor of Loris Shano Russell.
= Chasmosaurus russelli STERNBERG, 1940 (sic)

Holotype: CMN (NMC) 8800

Locality: NE 1/4, sec. 21, T2, R4, W of 4th Meridian, about 17 1/2 miles south and 9 miles east of Manyberries, Forty Mile 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, the anterior part of the rostral, the distal half of left jugal, right jugal, quadrate an squamosal and a little of the right edge were destroyed by erosion.

Note: Paleopathology has a deformed frontal and nasals, which, in turn altered the nasal horncore shape.

Paratype

CMN (NMC) 8803

Locality: South Saskatchewan River, NW 1/4, sec. 12, T30, R16, W. of 3rd Meridian, Alberta Provicnce, 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: Posterior part of the parietals.

Referred material:

GODFREY & HOLMES, 1995

CMN (NMC) 41933: Posterolateral corner of parietal bar. Shape suggests a broadly rounded posterior margin, Medial margin is gently rounded.

cf. Chasmosaurus russelli GODFREY & HOLMES, 1995, TANKE & FARKE, 2006

Locality: At or near Dinosaur Provincal Park, Newell County, Alberta Provicnce, 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 83.25.1: Skull missing the snout, left postorbital horn core, and left caudal maring of the frill.
Note: Squamosal fenestra, left side (TANKE & FARKE, 2006)

After Godfrey & Holmes, 1995.

Locality: Quarry 164, 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 81.19.175: Isolated skull preserving the right half of the cranium and frill except the distal segment of the parietal bar.

After Godfrey & Holmes, 1995.

Locality: Quarry 010, Dinosaur Provincial Park, 2 1/2 miles southeast of the mouth of Little Sandhill Creek, 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:

CMN (NMC) 2280 (Female?): Skull and fragmentary skeleton.
Note: Paleopathology, right orbital horncore was injured during life.

After Godfrey & Holmes, 1995.

= 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.

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A Chasmosaurus bone-bed has been discovered in the Judith River Formation along the South Saskatchewan River north of Medicine Hat, Alberta, Canada.
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