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Ceratopsia

Taxonomy

Ceratopsia was named by Marsh (1890). It is not extant. It was considered monophyletic by Butler et al. (2008).

It was synonymized subjectively with Ceratopsoidea by Hay (1902); it was reranked as the infraorder Ceratopsia by Cooper (1985); it was reranked as the unranked clade Ceratopsia by Butler et al. (2008) and Han et al. (2012).

It was assigned to Predentata by Marsh (1894), Marsh (1895), Marsh (1896) and Hatcher et al. (1907); to Orthopoda by Lull (1912); to Enoplosauria by Swinton (1970); to Neornithopoda by Cooper (1985); to Thyreophora by Bakker (1986); to Ornithischia by Lull (1915), Matthew (1915), Lull (1933), Romer (1956), Kuhn (1964), Estes (1964), Romer (1966), Thulborn (1971), Ostrom (1980), McIntosh (1981), Russell (1984), Maryanska and Osmólska (1985), Carroll (1988), Buffetaut and Ingavat (1992) and Peng et al. (2001); and to Marginocephalia by Sereno (1986), Sues and Galton (1987), Benton (1990), Dodson (1990), Sereno (1997), Sereno (1998), Sereno (1999), Sereno (2000), Lambert et al. (2001), Weishampel (2004), Xu et al. (2006), Butler et al. (2007), Butler et al. (2008) and Han et al. (2012).

Subtaxa

Albalophosaurus, Chaoyangosauridae, Chaoyangsauridae, Chaoyangsaurus (syn. Chaoyangosaurus), Eoceratopsinae, Ligabueichnium, Micropachycephalosaurus, Neoceratopsia, Psittacosauridae, Psittacosauroidea, Stenopelix, Yinlong

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Synonyms

Psittacosaurus sattayaraki was named by Buffetaut and Ingavat (1992). Its type specimen is TF 2449a. Its type locality is Ban Dong Bang Noi, which is in an Aptian/Albian terrestrial sandstone/conglomerate in the Khok Kruat Formation of Thailand.

It was considered a nomen dubium by You and Dodson (2004); it was considered a nomen dubium by Sereno (2010).
Ponderopoda was named by Huene (1948).

It was synonymized subjectively with Ceratopsia by Kuhn (1964).

It was assigned to Ornithischia by Huene (1948).
Kulceratops was named by Nessov (1995). Its type is Kulceratops kulensis.

It was considered a nomen dubium by You and Dodson (2004).

It was assigned to Protoceratopsidae by Nessov (1995); and to Protoceratopidae by Tereschenko and Alifanov (2003).
Kulceratops kulensis was named by Nessov (1995). Its type specimen is CCMGE No. 495/12457, a maxilla, and it is not a trace fossil. Its type locality is SH-20, Khodzhakul, which is in an Albian terrestrial sandstone/claystone in the Khodzhakul Formation of Uzbekistan. It is the type species of Kulceratops.

It was considered a nomen dubium by You and Dodson (2004).

Synonymy list

Year	Name and author
1890	Ceratopsia Marsh p. 418
1894	Ceratopsia Marsh
1895	Ceratopsia Marsh
1896	Ceratopsia Marsh p. 243
1907	Ceratopsia Hatcher et al. p. 10
1912	Ceratopsia Lull p. 210
1915	Ceratopsia Lull p. 117
1915	Ceratopsia Matthew p. 32
1933	Ceratopsia Lull p. 74
1948	Ponderopoda Huene p. 95
1956	Ceratopsia Romer p. 636
1964	Ceratopsia Estes p. 145
1964	Ceratopsia Kuhn p. 52
1966	Ceratopsia Romer p. 370
1970	Ceratopsia Swinton p. 117
1971	Ceratopsia Thulborn pp. 77-78 fig. 4
1980	Ceratopsia Ostrom p. 23
1981	Ceratopsia McIntosh p. 40
1984	Ceratopsia Russell p. 29
1985	Ceratopsia Cooper p. 291
1985	Ceratopsia Maryanska and Osmólska pp. 143-144 fig. 1
1986	Ceratopsia Bakker p. 461
1986	Ceratopsia Sereno
1987	Ceratopsia Sues and Galton pp. 36-37
1988	Ceratopsia Carroll
1990	Ceratopsia Benton p. 19
1990	Ceratopsia Dodson p. 562
1992	Ceratopsia Buffetaut and Ingavat
1992	Psittacosaurus sattayaraki Buffetaut and Ingavat
1993	Psittacosaurus sattayaraki Buffetaut et al. p. 57
1995	Kulceratops Nessov pp. 52-53 figs. Pl. 4:12
1995	Kulceratops kulensis Nessov pp. 52-54 figs. Pl. 4:12
1997	Psittacosaurus sattayaraki Buffetaut et al. p. 183
1997	Ceratopsia Sereno p. 443
1998	Psittacosaurus sattayaraki Buffetaut p. 94
1998	Ceratopsia Sereno p. 62
1999	Ceratopsia Sereno p. 2138 fig. 2
2000	Ceratopsia Sereno p. 482
2001	Ceratopsia Lambert et al. p. 7
2001	Ceratopsia Peng et al. p. 35
2002	Psittacosaurus sattayaraki Buffetaut and Suteethorn pp. 71-73
2003	Kulceratops Tereschenko and Alifanov p. 301
2003	Kulceratops kulensis Tereschenko and Alifanov p. 301
2004	Ceratopsia Weishampel p. 323
2005	Psittacosaurus sattayaraki Buffetaut et al. pp. 577-578
2006	Ceratopsia Xu et al. p. 2135
2007	Psittacosaurus sattayaraki Buffetaut et al. p. 338
2007	Ceratopsia Butler et al. p. S19 fig. S2
2008	Ceratopsia Butler et al. pp. 21-22
2008	Psittacosaurus sattayaraki Suteethorn and Buffetaut p. 55
2012	Ceratopsia Han et al. p. 1391 fig. 14

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