Genus: Nedoceratops UKRAINSKY, 2007
Etymology. The name Nedoceratops consists of the Russian prefix "nedo" meaning insufficiency and the generic name Ceratops Marsh, 1888.
= Diceratops HATCHER vide LULL, 1905/MARSH, HATCHER & LULL, 1907 non FOERSTER, 1868
Etymology: Greek, di- “two”, Greek, ceratops, “horn face”: “two horn face”.
= Diceratus MATEUS, 2008
Etymology: Greek, di- “two”, Greek, ceratos, “horned": “two horned.”
= Triceratops subgenus Diceratops LULL, 1933

Species: hatcheri (HATCHER vide LULL, 1905/MARSH, HATCHER & LULL, 1907) UKRAINSKY, 2007
= Diceratops hatcheri HATCHER vide LULL, 1905/MARSH, HATCHER & LULL, 1907
Etymology: In honor of John Bell Hatcher.
= Triceratops hatcheri (HATCHER vide LULL, 1905/MARSH, HATCHER & LULL, 1907
= Triceratops subgenus Diceratops hatcheri (HATCHER vide LULL, 1905/MARSH, HATCHER & LULL, 1907) LULL, 1933
= Diceratus hatcheri (HATCHER vide LULL, 1905/MARSH, HATCHER & LULL, 1907) MATEUS, 2008

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.

Material: Skull lacking tips of horns and parietals had been eroded away.

Referred material:

OSTROM & WELLNHOFFER, 1986

Locality: Lance Creek, Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

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

Material:

YPM 1833:

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Species: albertensis (STERNBERG, 1949)
Etymology: In reference to the Province of Alberta, Canada.
= Triceratops albertensis (STERNBERG, 1949)

Holotype: NMC 8862

Locality: Dry Island Buffalo Jump Provincial Park, NW 1/4, sec. 2, tp. 34, R22, W. 4th mer. on the West side of Red Deer River, Wheatland County, Alberta Province, Canada.

Horizon: Scollard Formation, Uppermost Edmonton Group.

Biostratigraphy:

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

Material: Left half of skull behind the nasal horncore, 2 dorsal vertebrae and several ribs.

Referred material:

LERBEKMO, SINGH, JARZEN & RUSSELL, 1979/RUSSELL & SINGH, 1978

Locality: In a coulee tributary in the Red Deer River valley, NW 1/4, Sect. 10, Tp.34, R.22, W4, Wheatland County, Alberta, Canada.

Horizon: 6m above cf. Tyrannosaurus rex skeleton and 4.5m below the Nevis coal seam, Scollard Formation, Uppermost Edmonton Group.

Biostratigraphy:

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

Material:

NMC 9542: Occipital condyle and a fragment of crest.

 

= Triceratops cf. albertensis BRAMAN & EBERTH, 1987

Locality: Dry Island Buffalo Jump Provincial Park, NW ¼, S 7 [ ?], T34, R21, oppiste mouth of Big Valley Creek, from sandy clay about 90 feet below ?Ardley Coal Seam, Wheatland County, Alberta Province, Canada.

Horizon: Scollard Formation, Uppermost Edmonton Group.

Biostratigraphy:

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

Material:

NMC 8861: Brow horns, dentary and lots of frill fragments.

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