Reptilia - Ornithischia - Ceratopsidae

Alternative combination: Ceratops horridus

Synonyms: Diceratops hatcheri Lull 1905, Diceratus hatcheri Lull 1905, Nedoceratops hatcheri Lull 1905, Sterrholophus flabellatus Marsh 1889, Triceratops albertensis Sternberg 1949, Triceratops brevicornis Hatcher and Lull 1905, Triceratops brevicornus Hatcher and Lull 1905, Triceratops brevirostris Hatcher and Lull 1905, Triceratops calcicornis Marsh 1898, Triceratops calicornis Marsh 1898, Triceratops californis Marsh 1898, Triceratops elatus Marsh 1891, Triceratops eurycephalus Schlaikjer 1935, Triceratops fabellatus Marsh 1889, Triceratops flabellatus Marsh 1889, Triceratops hatcheri Lull 1905, Triceratops obtusa Marsh 1898, Triceratops obtusus Marsh 1898, Triceratops serratus Marsh 1890

Full reference: O. C. Marsh. 1889. Notice of gigantic horned Dinosauria from the Cretaceous. American Journal of Science 38:173-175

Belongs to Triceratops according to N. R. Longrich and D. J. Field 2012

See also Anonymous 1963, Arldt 1930, Armitage and Anderson 2013, Boule 1891, Breithaupt 1985, Breithaupt 1997, Brown 1907, Brown 1914, Brown 1914, Brown and Schlaikjer 1940, Buchholz 2002, Butler et al. 2008, Charig 1967, Chinnery 2004, Currie et al. 2008, Currie and Padian 1997, D'Anastasio et al. 2022, Derstler 1994, Diem and Archibald 2005, Dodson and Currie 1990, Dodson et al. 2004, Eberth 1997, Eberth et al. 2001, Erickson 2017, Farke 2007, Farke 2011, Forster 1996, Gadow 1901, Gegenbaur 1898, Goodwin and Horner 2010, Goodwin and Horner 2014, Gray 1946, Hatcher and Lull 1905, Hatcher et al. 1907, Hay 1902, Hay 1930, Huene 1914, Huene 1927, Huene 1931, Huene 1950, Hunt and Lehman 2008, Jaekel 1911, Johnson 1931, Knowlton 1909, Kuhn 1964, Lambe 1902, Lambe 1915, Langston 1975, Laub 1979, Lehman 1990, Lehman 1996, Lehman 1998, Longrich 2010, Longrich 2014, Lull 1903, Lull 1910, Lull 1933, Lull and Gray 1949, Makovicky 2001, Mallon et al. 2022, Mansel-Pleydell 1902, Marsh 1889, Marsh 1889, Marsh 1890, Marsh 1891, Marsh 1891, Marsh 1896, Marsh 1897, Marsh 1898, Mateus 2008, McGinnis 1982, McIntosh 1981, Nopcsa 1901, Ostrom 1965, Ostrom and Wellnhofer 1986, Ostrom and Wellnhofer 1990, Parks 1925, Perrier 1928, Pompeckj 1920, Retallack 1994, Russell 1930, Russell 1964, Russell 1966, Scannella and Horner 2010, Scannella and Horner 2011, Schlaikjer 1935, Schuyf 1969, Sloan 1976, Sloan 1985, Sternberg 1940, Sternberg 1949, Swinton 1934, Swinton 1970, Tatarinov 1964, Tokaryk 1986, Tornier 1913, Ukrainsky 2007, von Zittel 1911, Walcott 1900, Winkler 1893, Woodward 1898 and Zittel 1890

Sister taxa: Triceratops prorsus, Triceratops sulcatus, Tatankaceratops sacrisonorum, Ojoceratops fowleri

Type specimens:

• Triceratops horridus: YPM 1820, a skull. Its type locality is Buck Creek pens, Johnson Brothers Ranch, which is in a Maastrichtian fluvial-lacustrine sandstone/shale in the Lance Formation of Wyoming.
• Nedoceratops hatcheri: USNM 2412, a skull. Its type locality is 3 miles southwest of Lightning Creek, which is in a Maastrichtian terrestrial sandstone in the Lance Formation of Wyoming.
• Triceratops albertensis: NMC 8862, a skull. Its type locality is T. albertensis type, Red Deer River (NMC), which is in a Maastrichtian terrestrial claystone/sandstone in the Scollard Formation of Canada.
• Triceratops brevicornus: YPM 1834, a skull. Its type locality is Lance Creek, 1.5 miles south of Lightning Creek, which is in a Maastrichtian terrestrial sandstone in the Lance Formation of Wyoming.
• Triceratops calicornis: USNM 4928, a skull. Its type locality is east of Lance Creek, which is in a Maastrichtian terrestrial horizon in the Lance Formation of Wyoming.
• Triceratops elatus: YPM 1201, a skull. Its type locality is Lance Creek, near mouth of Lightning Creek, which is in a Maastrichtian terrestrial shale in the Lance Formation of Wyoming.
• Triceratops eurycephalus: MCZ 1102, a partial skeleton. Its type locality is 1.5 miles up Horse Creek (41 ft), which is in a Maastrichtian terrestrial sandstone/shale in the Lance Formation of Wyoming.
• Triceratops flabellatus: YPM 1821, a skull. Its type locality is ridge between Buck Creek and Lance Creek, which is in a Maastrichtian terrestrial marl in the Lance Formation of Wyoming.
• Triceratops obtusus: YPM, a skull. Its type locality is 2 miles southeast of U-L Ranch, Buck Creek, which is in a Maastrichtian terrestrial horizon in the Lance Formation of Wyoming.
• Triceratops serratus: YPM 1823 (= Sk. 4), a skull. Its type locality is Middle Fork, Dry Creek, which is in a Maastrichtian terrestrial sandstone in the Lance Formation of Wyoming.

Distribution:

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Specimen images are retrieved through the ePANDDA API.