Species: horridus (MARSH, 1889) MARSH, 1889
Etymology:

Referred material:

D'ANASTASIO, CILLI, BACCHIA, FANTI, GOBBO & CAPASSO, 2022

Locality: Mud Butte Ranch, 45°03'11.26"N, 102°52'5o.582"W, southwestern Perkins County, South Dakota.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

"Big John": Fragmentary skull and skeleton.

Note: A lesion on the left squamosal.

 

HAPP & MORROW, 1997, HAPP & MORROW, 2000, HAPP, 2003

Locality: Near Jordan, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SUP 9713: Skull and fragmentary skeleton of a juvenile.
Note: Skin impressions and teeth marks from crocodilians and small theropods.
Note: HAPP & MORROW, 2000, state that there is soft tissue impressions in the skull.
Note: HAPP 2003, 2008 notes that there are pathologies on the skull, the left horn is missing more than 1/3rd its length, toothmarks, 3 parallel marks on the left squamosal.

 

TOKARYK, 1985

Locality: Locality 72F08-0003, Triceratops Quarry, 22 mi South of Shaunavon, LSD 7, S5, T5, R18W 3rd Meridian, Frenchman River Valley, Saskatchewan Province, Canada.

Horizon: Frenchman Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMNH P1163.4: Nearly complete skull.
Note: Paleopathology, serious healing transverse fracture on the parietal bar also possible pathologic frill (TANKE & ROTHSCHILD, 2002, TANKE, FARKE & GILBERT, 2009).

 

= Triceratops serratus MARSH, 1890
Etymology:

Holotype: YPM 1823

Locality: Lightning Creek, Niobrara County, Wyoming.

Note: According to HATCHER, MARSH & LULL is as follows. ‘the exact locality was on the north side of the middle fork and about 3 miles above the mouth of the draw of Dry Creek, which empties into Lance Creek form the west, immediately below the U-L cattle ranch, then long abandoned, but now occupied as a sheep ranch by r. Jacob Mills.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Skull and jaws.
Note: Paleopathology, the right mandibular ramus is somewhat pathologic (LULL, 1933).

 

 

= Triceratops elatus MARSH, 1891
Etymology:

Holotype: USNM 1201

Locality: Lance Creek, Niobrara County, Wyoming.
Note: According to HATCHER, MARSH & LULL, 1907, “It lay on the gently sloping hillside, about a quarter of a mile form the creek and directly opposite the mouth of Lightning Creek.”

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Skull (male).
Note: Paleopathology, left squamosal has a perforaton (TANKE & ROTHSCHILD, 2002).

 

 

= Triceratops sulcatus MARSH, 1890 (nomen dubium)
Etymology:

Holotype: USNM 4276

Locality: Niobrara County, Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Note: Perhaps somewhat above that of any of the other members of the ceratopsidae, other than T. flabellatus.

Material: Poorly persevered skull, jaws, several vertebrae and some limb material.
Note: Paleopathology, an orbital horn core evidently suffered a fracture in life with the distal portion being subsequently lost (HATCHER, MARSH & LULL, 1908, reprinted 1980)

 

= Diceratops hatcheri LULL, 1907
Etymology:

Holotype: USNM 2412

Locality: 3 miles southwest of the mouth of Lightning Creek, Converse County, Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Note: Paleopathology, the skull has several ‘holes’ in the frill.

_____________________________________________________________________________________
Species: prorsus MARSH, 1890
Etymology:

Referred material:

Locality:

Horizon:

Biostratigraphy:

Age: Late Cretaceous.

Material:

Science Museum of Minnesota: Partial skull and skeleton.
Note: Skull shows a partially healded-puncture wound just below the left eye, may be from another Triceratops. (ROBERT J. MEYERSON pers comm).

_____________________________________________________________________________________
Sp

FARKE & ALLEY, 2006

Locality: Full locality data are on file at the TLAM, Corson County, South Dakota.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.

Material:

TLAM G. BA.2004.024.0001: Abnormal squamosal.

Note: Paleopathologic and show rehealing.

KAYE, 1997 in TANKE & ROTHSCHILD, 2002

Locality: Near Lewistown, Feigns County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

FMNH: Skull.
Note: Palaeopathology, one horn is 24 inches long the other is 31 inches long.

 

TANKE & FARKE, 2006

Locality: Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

MOR 965: Skull, including frill, quadrate, jugal and nasal horn core.
Note: POL, left side.

MOR 1120: Skull.
Note: Irregular depression on the left jugal.

 

Locality: Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 84.39.12: Fragmentary skull.
Note: Ovate depression, left side of nasal horn core.

ILLIES & FOWLER, 2020

Locality: DDM SIte #154/Fedral Site ND 92-19, Custer National Forest, Bowman County?, Southwest North Dakota.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

NDGS 1715: A partal skull and postcranium.

Note: With five fused caudal vertebrae putting a kink in the tail.

_____________________________________________________________________________________