Genus: Pentaceratops OSBORN, 1923
Etymology: Greek, penta, “five” and Greek, ceratops, “horn face”: “five-horned face”.

Species: sternbergi OSBORN, 1923 (emend LEHMAN, 1998)
Etymology: In honor of Charles M. Sternberg.
= Chasmosaurus sternbergi (OSBORN, 1923) PAUL, 1987
= Pentaceratops sternbergii OSBORN, 1923

Holotype: AMNH 6325

Locality: 9 miles (14.4 km) northeast of Tsaya, NW 1/4, T22N, R11W, San Juan County, New Mexico.

Horizon: Fruitland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Skull.

Composite skull based on AMNH 1624, MNA PL.1747, and UNM FKK-081 (After LEHMAN, 1993).

Referred material:

 

FOWLER & SULLIVAN, 2006

Locality: SMP Locality 210, San Juan Basin, San Juan County, New Mexico.

Horizon: De-na-zin Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1900: Pelvis with sacrum.
Note: Tooth impressions of Daspletosaurus?

 

 

LEHMAN, 1993

Locality: Near Tsaya, San Juan County, New Mexico.

Horizon: Fruitland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

AMNH 1622: Skull lacking frill.

AMNH 1624: Skull lacking end of frill.

AMNH 1625: Posterior end of frill.

 

 

Locality: New Mexico.

Horizon: Lower Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian age, Upper Campanian Stage- Lower Maastrichtian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

UALP 13342: Skull lacking frill.

 

 

 

SMITH & WILLIAMSON, 2005

Locality: Bisti/De-na-zin Wilderness area, New Mexico.

Horizon: Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian age, Upper Campanian Stage- Lower Maastrichtian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

NMMNH P-27468: Partial skull and associated partial skeleton.

Note: Pathologic or ontogenetic stage.

 

= cf. Pentaceratops sternbergii SULLIVAN, 2006

Locality: Eagle's Nest Flat, SMP locality 398, Ah-Shi-Sle-Pah Wilderness Study Area, San Juan Basin, San Juan County, New Mexico.

Horizon: Fossil Forest Member, Fruitland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1596: Distal end of a quadrate, partial? jugal and fragments of epoccipitals.

 

Locality: Denver's Blowout, SMP locality 281, Ah-Shi-Sle-Pah Wilderness Study Area, San Juan Basin, San Juan County, New Mexico.

Horizon: Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian age, Upper Campanian Stage- Lower Maastrichtian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1488: Portion of jugal with orbital rim.

SMP VP-1500: Nearly complete parietal incomplete suamosals, jugal adn epoccipital.

 

Locality: Ah-shi-sle-pah Wash (west), SMP Locality 228, Ah-Shi-Sle-Pah Wilderness Study Area, San Juan Basin, San Juan County, New Mexico.

Horizon: Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian age, Upper Campanian Stage- Lower Maastrichtian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1712: Left jugal and quadratojugal.

SMP VP-1508: 2 complete dorsal vertebra and lower half of a centrum of another.

 

Locality: Ah-shi-sle-pah Wash (east), SMP Locality 365, Ah-Shi-Sle-Pah Wilderness Study Area, San Juan Basin, San Juan County, New Mexico.

Horizon: Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian age, Upper Campanian Stage- Lower Maastrichtian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1144: Axis vertebra.

 

SULLIVAN & WILLAMSON, 1997

Locality: New Mexico.

Horizon:

Biostratigraphy:

Age: Late Cretaceous.

Material:

PMU.R268: Dentaries, articulars and postcranial skeleton.

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Species: fenestratus WIMAN, 1930
Etymology: Latin, fenestratus, "window."

Holotype: University of Uppsala, Sweden, PMU R200

Locality: 1 miles South of Kimbetoh Wash St. on south branch of Meyers Creek, NW 1/4, T22N, R10W? San Juan County, New Mexico.

Horizon: De-na-zin Member, Lower Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian age, Upper Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Nearly complete skull and dentary.
Note: Possible paleopathology, ‘extra fontanelle’ in the squamosal (LULL, 1933, GILMORE, 1935), possibly from thrust injuries? (TANKE & ROTHSCHILD, 2002)

Referred material:

Locality: South Branch of Meyer Creek, 4 miles above Cattle Ranch, San Juan County, New Mexico.

Horizon: De-na-zin Member, Lower Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian age, Upper Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material:

PMU R268 (Example B): 2 pieces of a squamosal and a part of a parietal, fragmentary skeleton.

Skull of type and referred skeletal material.

 

Locality: South side of Alamo Wash, 3 miles above Hunter’s Store, New Mexico.

Horizon: Fruitland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

PMU: Not given: Lower part of a squamosal, the distal part of a quadrate, and the proximal part of a supraorbital horn.

 

 

WOLBERG, HALL, BELLIS, CHAVEZ, ANDERSON, MORO & GIL, 1988/HUNT, 1991

Locality: Fossil Forest Locality, near Split Lip Flats, San Juan Basin, San Juan County, New Mexico.

Horizon: Fruitland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

Number: Not given: Well preserved sacrum, femur, dorsal ribs, ilium, pelvic fragment, edentulous lower jaw, humerus, frill fragment, second phalanx, ischium, ilium, tibia, cranial fragment.

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Species: aquilonius LONGRICH, 2014
Etymology: Latin, aquilonius, "northern"
= Anchiceratops sp LANGSTON, 1959

Holotype: CMN (old NMC) 9813

Locality: Subdivision 14, Sec. 24, Tp. 2, Rge. 4, west of the Fourth Meridian Sectional Map 16, Milk River, Warner County, Alberta Province, Canada.

Horizon: Horseshoe Canyon Formation, Edmonton Group.

Biostratigraphy:

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

Material: Right squamosal and adjacent parietal.

Referred material:


Locality: Line between sections 10 and 15 just east of the quarter-section post in Tp. 3, Rge. 5, west of the Fourth Meridian, 14 miles south-southeast of Manyberries and 10 miles northeast of the previous specimen, Warner County, Alberta Province, Canada.

Horizon: Horseshoe Canyon Formation, Edmonton Group.

Biostratigraphy:

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

Material:

CMN (old NMC) 9814: Three epoccipital bones, two of them attached to a piece of frill.

 

DIEM & ARCHIBALD, 2005

Locality: South of Rangley, Rio Blanco County, Northwestern Colorado.

Horizon: Lower Williams Fork Formation.

Biostratigraphy: Didymoceras cheyennense zone.

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

Material:

SDNHM 43470: A partial skull, consists of the predentary and elements from the right side of the skull, including: maxillary fragment containing 17 teeth, jugal, quadratojugal, inferior parts of the braincxe, nearly complete right squamosal, median and laterial fragments of parietal, pterygoid, quadrate, and parts of the right dentary.