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Chasmosaurinae
Taxonomy
Chasmosaurinae was named by Lambe (1915). It is not extant. Its type is Chasmosaurus.
It was assigned to Ceratopsia by Lambe (1915); and to Ceratopsidae by Lehman (1989), Dodson and Currie (1990), Lehman (1990), Godfrey and Holmes (1995), Lehman (1996), Dodson (1997), Dodson (1997), Sereno (1997), Eberth et al. (2001), Dodson et al. (2004), Farke (2004), Ryan and Evans (2005), Ryan and Russell (2005), Wu et al. (2007), Ryan (2007), Longrich (2010), Xu et al. (2010), Maidment and Barrett (2011), Farke et al. (2011), Longrich (2013), Longrich (2014), Mallon et al. (2014), Brown and Henderson (2015), Morschhauser et al. (2019) and Fowler and Freedman Fowler (2020).
It was assigned to Ceratopsia by Lambe (1915); and to Ceratopsidae by Lehman (1989), Dodson and Currie (1990), Lehman (1990), Godfrey and Holmes (1995), Lehman (1996), Dodson (1997), Dodson (1997), Sereno (1997), Eberth et al. (2001), Dodson et al. (2004), Farke (2004), Ryan and Evans (2005), Ryan and Russell (2005), Wu et al. (2007), Ryan (2007), Longrich (2010), Xu et al. (2010), Maidment and Barrett (2011), Farke et al. (2011), Longrich (2013), Longrich (2014), Mallon et al. (2014), Brown and Henderson (2015), Morschhauser et al. (2019) and Fowler and Freedman Fowler (2020).
Subtaxa
Agujaceratops, Anchiceratops, Arrhinoceratops, Bisticeratops, Bravoceratops, Ceratops (syn. Proceratops), Chasmosaurus (syn. Protorosaurus, Eoceratops, Mojoceratops) (type genus), Coahuilaceratops, Judiceratops, Kosmoceratops, Medusaceratops, Navajoceratops, Pentaceratops, Sierraceratops, Spiclypeus, Terminocavus, Triceratopsini, Utahceratops, Vagaceratops (syn. Mercuriceratops)
Synonyms
Synonymy list
Year | Name and author |
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1888 | Ceratops Marsh |
1888 | Ceratops montanus Marsh p. 477 |
1888 | Ceratops Marsh p. 478 |
1890 | Ceratops Zittel p. 751 |
1890 | Ceratops montanus Zittel p. 751 |
1893 | Ceratops Winkler p. 105 |
1893 | Ceratops montanus Winkler p. 105 |
1895 | Ceratops Marsh |
1896 | Ceratops Depéret p. 185 |
1896 | Ceratops montanus Hatcher p. 113 |
1896 | Ceratops Marsh p. 243 |
1897 | Ceratops Gadow p. 205 |
1898 | Ceratops Gadow p. 23 |
1900 | Ceratops montanus Walcott p. 23 |
1901 | Ceratops Nopcsa p. 216 |
1901 | Ceratops montanus Nopcsa p. 216 |
1902 | Ceratops Hay p. 500 |
1902 | Ceratops montanus Hay p. 500 |
1902 | Ceratops Mansel-Pleydell p. lxxxiv |
1902 | Ceratops montanus Mansel-Pleydell p. lxxxv |
1906 | Proceratops Lull p. 144 |
1906 | Proceratops montanus Lull p. 144 |
1907 | Ceratops Hatcher et al. p. 11 |
1907 | Ceratops montanus Hatcher et al. pp. 100, 172 |
1909 | Ceratops Huene p. 18 |
1910 | Ceratops monatus Lull p. 772 |
1911 | Ceratops Lambe p. 9 |
1911 | Ceratops von Zittel p. 296 |
1914 | Ceratops Brown p. 377 |
1915 | Ceratops montanus Lambe p. 10 |
1915 | Chasmosaurinae Lambe p. 20 |
1915 | Ceratops Matthew p. 30 |
1919 | Ceratops Gilmore p. 64 |
1924 | Ceratops Lull p. 245 |
1925 | Ceratops Gregory and Mook p. 5 |
1927 | Ceratops Huene p. 259 |
1927 | Ceratops montanus Huene p. 261 |
1928 | Ceratops Nopcsa p. 185 |
1930 | Ceratops monatus Arldt p. 702 |
1930 | Ceratops Hay p. 223 |
1930 | Ceratops montanus Hay p. 223 |
1930 | Ceratops montanus Russell p. 142 |
1931 | Ceratops montanus Johnson p. 368 |
1933 | Ceratops Lull p. 96 |
1933 | Ceratops montanus Lull p. 96 |
1950 | Ceratops Huene p. 351 |
1956 | Ceratops Romer p. 639 |
1964 | Ceratops Kuhn p. 55 |
1964 | Ceratops montanus Kuhn p. 55 |
1964 | Ceratops montanus Russell p. 10 |
1964 | Ceratops Tatarinov p. 585 |
1964 | Ceratops montanus Tatarinov p. 585 |
1966 | Ceratops Romer p. 371 |
1967 | Ceratops Charig p. 717 |
1970 | Ceratops Swinton p. 254 |
1973 | Ceratops Powell p. 118 |
1979 | Ceratops Laub p. 4 |
1979 | Ceratops montanus Laub p. 4 |
1981 | Ceratops Lehman p. 207 |
1986 | Ceratops Ostrom and Wellnhofer p. 116 |
1989 | Chasmosaurinae Lehman p. 138 |
1990 | Chasmosaurinae Dodson and Currie p. 612 |
1990 | Chasmosaurinae Lehman p. 212 |
1995 | Chasmosaurinae Godfrey and Holmes p. 727 |
1996 | Chasmosaurinae Lehman p. 505 fig. 10 |
1997 | Chasmosaurinae Dodson p. 12 |
1997 | Chasmosaurinae Sereno p. 443 |
2001 | Chasmosaurinae Eberth et al. p. 59 |
2001 | Ceratops montanus Horner et al. p. 10 |
2004 | Chasmosaurinae Dodson et al. p. 495 |
2004 | Chasmosaurinae Farke p. 5 |
2005 | Chasmosaurinae Ryan and Evans pp. 323-324 |
2005 | Chasmosaurinae Ryan and Russell p. 1381 fig. 10 |
2007 | Chasmosaurinae Ryan p. 391 fig. 12 |
2007 | Chasmosaurinae Wu et al. p. 1261 fig. 14 |
2010 | Chasmosaurinae Longrich p. 692 fig. 10 |
2010 | Chasmosaurinae Xu et al. p. 1634 fig. 3 |
2011 | Chasmosaurinae Farke et al. p. 699 |
2011 | Chasmosaurinae Maidment and Barrett p. 4 |
2013 | Chasmosaurinae Longrich |
2014 | Chasmosaurinae Longrich p. 303 fig. 8 |
2014 | Chasmosaurinae Mallon et al. |
2015 | Chasmosaurinae Brown and Henderson |
2019 | Chasmosaurinae Morschhauser et al. p. 129 fig. 10 |
2020 | Chasmosaurinae Fowler and Freedman Fowler |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Subfm. †Chasmosaurinae Lambe 1915
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G. †Anchiceratops Brown 1914
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†Anchiceratops ornatus Brown 1914
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Invalid names: Anchiceratops longirostris Sternberg 1926 [synonym]
G. †Chasmosaurus Lambe 1914
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†Chasmosaurus belli Lambe 1902
†Chasmosaurus russelli Sternberg 1940
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Invalid names: Mojoceratops perifania Longrich 2010 [synonym]
Invalid names: Chasmosaurus brevirostris Lull 1933 [nomen dubium], Chasmosaurus kaiseni Brown 1933 [nomen dubium], Eoceratops Lambe 1915 [synonym], Mojoceratops Longrich 2010 [synonym], Monoclonius canadensis Lambe 1902 [nomen dubium], Protorosaurus Lambe 1914 [synonym]
G. †Navajoceratops Fowler and Freedman Fowler 2020
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†Navajoceratops sullivani Fowler and Freedman Fowler 2020
G. †Pentaceratops Osborn 1923
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†Pentaceratops sternbergii Osborn 1923
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Invalid names: Pentaceratops fenestratus Wiman 1930 [synonym]
G. †Terminocavus Fowler and Freedman Fowler 2020
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†Terminocavus sealeyi Fowler and Freedman Fowler 2020
Unr. †Triceratopsini Longrich 2011
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G. †Triceratops Marsh 1889
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†Triceratops horridus Marsh 1889
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Invalid names: Nedoceratops hatcheri Lull 1905 [synonym], Triceratops albertensis Sternberg 1949 [synonym], Triceratops brevicornus Hatcher and Lull 1905 [synonym], Triceratops calicornis Marsh 1898 [synonym], Triceratops elatus Marsh 1891 [synonym], Triceratops eurycephalus Schlaikjer 1935 [synonym], Triceratops flabellatus Marsh 1889 [synonym], Triceratops obtusus Marsh 1898 [synonym], Triceratops serratus Marsh 1890 [synonym]
†Triceratops prorsus Marsh 1890
Invalid names: Nedoceratops Ukrainsky 2007 [synonym], Ojoceratops Sullivan and Lucas 2010 [synonym], Sterrholophus Marsh 1891 [synonym], Tatankaceratops Ott and Larson 2010 [synonym], Triceratops sulcatus Marsh 1890 [nomen dubium]
G. †Vagaceratops Sampson 2010
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†Vagaceratops irvinensis Holmes et al. 2001
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Invalid names: Mercuriceratops gemini Ryan et al. 2014 [synonym], Pentaceratops aquilonius Longrich 2014 [synonym]
Invalid names: Mercuriceratops Ryan et al. 2014 [synonym]
Invalid names: Ceratops Marsh 1888 [nomen dubium]
Diagnosis
Reference | Diagnosis | |
---|---|---|
S. C. R. Maidment and P. M. Barrett 2011 | Modified from Lehman (1989): large ceratopsian dinosaurs with long, low facial region (preorbital length/height ratio = 1.4 to 3.0); inter-premaxillary fossae present; premaxilla and predentary with horizontal or poorly developed lateral cutting flange; nasal horn core, if present, small and formed in part by a separate ossification (epinasal); postfrontal foramen present; frontoparietal fontanelle walled mostly by the postorbital bones; frontal bones reduced; prefrontal bones small; cranial frill long (0.94 to 1.70 basal length of skull, except in Triceratops); triangular squamosal bones (length/height ratio = 2.0 to 3.5); prominent longitudinal channel in ventral surface of sacrum; triangular acromial process of the scapula arises about half way along the scapula blade; deep triceps fossa on the caudolateral deltopectoral crest of the humerus; foramen on the caudomedial humerus located dorsal to the apex of the deltopectoral crest; strongly curved ischium. |