Triceratops horridus

Triceratops horridus


Taxonavigation: Ceratopsoidea 

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Archosauromorpha
Cladus: Crurotarsi
Divisio: Archosauria
Cladus: Avemetatarsalia
Cladus: Ornithodira
Subtaxon: Dinosauromorpha
Cladus: Dinosauriformes
Cladus: Dracohors
Cladus: Dinosauria
Ordo: †Ornithischia
Cladus: †Genasauria
Cladus: †Neornithischia
Cladus: †Cerapoda
Cladus: †Marginocephalia
Subordo: †Ceratopsia
Cladus: †Neoceratopsia
Superfamilia: †Ceratopsoidea

Familia: †Ceratopsidae
Subfamillia: †Chasmosaurinae
Genus: †Triceratops
Species: Triceratops horridus


  • Triceratops horridus (Marsh, 1889a)

Type locality: Lance Formation, Wyoming, USA.
Holotype: YPM 1820


  • Ceratops horridus Marsh, 1889a


  • Sterrholophus flabellatus Marsh, 1889
  • Triceratops calicornis Marsh, 1898
  • Triceratops elatus Marsh, 1891
  • Triceratops obtusus Marsh, 1898
  • Triceratops serratus Marsh, 1890

Other combination

  • Triceratops horridus: Marsh, 1889b


  • Marsh, O.C. 1889a: Notice of new American Dinosauria. The American Journal of Science and Arts, series 3 38: 331–336.
  • Marsh, O.C. 1889b: Notice of gigantic horned Dinosauria from the Cretaceous. American Journal of Science 38: 173–175.
  • Forster, C.A. 1996: Species resolution in Triceratops: cladistic and morphometric approaches. Journal of Vertebrate Paleontology 16 (2): 259–270.
  • Scannella, J.B. & Fowler, D.W. 2009: Anagenesis in Triceratops: evidence from a newly resolved stratigraphic framework for the Hell Creek Formation. Pp. 148–149 in 9th North American Paleontological Convention Abstracts. Cincinnati Museum Center Scientific Contributions 3.
  • Scannella, J. & Horner, J.R. 2010: Torosaurus Marsh, 1891, is Triceratops Marsh, 1889 (Ceratopsidae: Chasmosaurinae): synonymy through ontogeny. Journal of Vertebrate Paleontology 30 (4): 1157 - 1168. DOI: 10.1080/02724634.2010.483632