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Cryptodontidae
Taxonomy
Cryptodontia was named by Owen (1859).
It was reranked as the family Cryptodontia by Owen (1860) and Owen (1861); it was synonymized subjectively with Oudenodontidae by Cope (1871); it was reranked as the unranked clade Cryptodontia by Kammerer and Angielczyk (2009) and Kammerer et al. (2011); it was corrected as Cryptodontidae by Haughton and Brink (1954), Ivakhnenko (2003) and Carrano (2025).
It was assigned to Sauria by Owen (1859); to Anomodontia by Haughton and Brink (1954); to Dicynodontoidea by Ivakhnenko (2003); to Bidentalia by Kammerer and Angielczyk (2009) and Kammerer et al. (2011); and to Anomodontia by Owen (1860), Owen (1861) and Carrano (2025).
It was reranked as the family Cryptodontia by Owen (1860) and Owen (1861); it was synonymized subjectively with Oudenodontidae by Cope (1871); it was reranked as the unranked clade Cryptodontia by Kammerer and Angielczyk (2009) and Kammerer et al. (2011); it was corrected as Cryptodontidae by Haughton and Brink (1954), Ivakhnenko (2003) and Carrano (2025).
It was assigned to Sauria by Owen (1859); to Anomodontia by Haughton and Brink (1954); to Dicynodontoidea by Ivakhnenko (2003); to Bidentalia by Kammerer and Angielczyk (2009) and Kammerer et al. (2011); and to Anomodontia by Owen (1860), Owen (1861) and Carrano (2025).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1859 | Cryptodontia Owen p. 141 |
| 1860 | Cryptodontia Owen p. 238 |
| 1861 | Cryptodontia Owen p. 261 |
| 1954 | Cryptodontidae Haughton and Brink p. 6 |
| 2003 | Cryptodontidae Ivakhnenko |
| 2009 | Cryptodontia Kammerer and Angielczyk |
| 2011 | Cryptodontia Kammerer et al. |
| 2025 | Cryptodontidae Carrano |
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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.
Fm. †Cryptodontidae Owen 1859
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Unr. †Geikiidae Nopcsa 1923
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Unr. †Geikiinae Nopcsa 1923
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G. †Aulacephalodon Seeley 1898
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†Aulacephalodon bainii Owen 1845
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Invalid names: Aulacocephalodon cadlei Broom 1948 [synonym], Aulacocephalodon hartzenbergi Broom 1937 [synonym], Aulacocephalodon haughtoni Broom 1921 [synonym], Aulacocephalodon latissimus Broom 1932 [synonym], Aulacocephalodon luckhoffi Broom 1937 [synonym], Aulacocephalodon peavoti Broom 1921 [synonym], Aulacocephalodon pricei Broom and George 1950 [synonym], Aulacocephalodon tigriceps Owen 1855 [synonym], Aulacocephalodon vanderhorsti Broom and George 1950 [synonym], Dicynodon bolorhinoides Watson 1960 [synonym], Dicynodon laticeps Broom 1912 [synonym], Proaulacocephalodon miltoni Toerien 1955 [synonym]
†Aulacephalodon cadlei Broom 1948
†Aulacephalodon rubidgei Broom 1940
Invalid names: Proaulacocephalodon Toerien 1955 [synonym]
G. †Odontocyclops Keyser and Cruickshank 1979
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Invalid names: Aulacocephalodontinae Toerien 1953 [empty]
Unr. †Oudenodontidae Cope 1871
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G. †Australobarbarus Kurkin 2000
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†Australobarbarus kotelnitshi Kurkin 2000
†Australobarbarus platycephalus Kurkin 2000
G. †Cteniosaurus Broom 1935
G. †Oudenodon Owen 1859
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†Oudenodon bainii Owen 1859
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Invalid names: Aulacocephalodon milletti Broom 1928 [synonym], Chelyrhynchus lachrymalis Haughton 1917 [synonym], Dicynodon allani Broom 1940 [synonym], Dicynodon andrewsi Broom 1921 [synonym], Dicynodon brachyrhynchus Broom 1948 [synonym], Dicynodon breviceps Haughton 1915 [synonym], Dicynodon corstorphinei Broom and Haughton 1917 [synonym], Dicynodon curtus Broom 1921 [synonym], Dicynodon cyclops Haughton 1917 [synonym], Dicynodon graaffi Broom 1940 [synonym], Dicynodon greyii Owen 1860 [synonym], Dicynodon kolbei Broom 1912 [synonym], Dicynodon lutriceps Broom 1912 [synonym], Dicynodon maccabei Broom 1940 [synonym], Dicynodon marlothi Broili and Schröder 1936 [synonym], Dicynodon megalops Owen 1876 [synonym], Dicynodon moutonae Broom 1948 [synonym], Dicynodon nesemanni Broom 1940 [synonym], Dicynodon prognathus Owen 1860 [synonym], Dicynodon richardi Broom 1940 [synonym], Dicynodon robertsi Broom 1948 [synonym], Dicynodon schwarzi Broom 1919 [synonym], Dicynodon truncatus Broom 1899 [synonym], Dicynodon vanderbyli Broom 1928 [synonym], Dicynodon wellwoodensis Broom 1936 [synonym], Oudenodon bolorhinus Broom 1911 [synonym], Oudenodon brevirostris Owen 1876 [synonym], Oudenodon glaucops Broom 1948 [synonym], Oudenodon halli Watson 1914 [synonym], Oudenodon latirostris Broom 1932 [synonym], Oudenodon luangwanensis Boonstra 1938 [synonym], Oudenodon mustoi Haughton 1915 [synonym], Oudenodon planus Broom 1913 [synonym], Oudenodon platyceps Broom 1913 [synonym], Oudenodon platyfrons Broom 1932 [synonym], Oudenodon robustus Broom 1932 [synonym], Oudenodon wilmanae Broom 1928 [synonym]
†Oudenodon grandis Haughton 1917
†Oudenodon sakamenensis Mazin and King 1991
Invalid names: Chelyrhynchus Haughton 1917 [synonym]
G. †Tropidostoma Seeley 1889
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G. †Pelanomodon Broom 1938
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†Pelanomodon moschops Broom 1913
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Invalid names: Dicynodon sidneyi Broom 1940 [synonym], Dicynodon tylorhinus Broom 1913 [synonym], Pelanomodon halli Broom 1950 [synonym], Pelanomodon rubidgei Broom 1938 [synonym], Propelanomodon devilliersi Toerien 1955 [synonym]
Invalid names: Propelanomodon Toerien 1955 [synonym]
Unr. †Rhachiocephalidae Maisch 2000
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G. †Kitchinganomodon Maisch 2002
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†Kitchinganomodon crassus Broom 1948
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Invalid names: Platycyclops acutirostris Broom and George 1950 [synonym], Platycyclops pricei Broom and George 1950 [synonym]
G. †Rhachiocephalus Seeley 1898
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†Rhachiocephalus behemoth Maisch 2005
†Rhachiocephalus magnus Owen 1876
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Invalid names: Dicynodon scheepersi Broom 1948 [synonym], Eocyclops longus Broom 1913 [synonym], Kitchingia planifrons Broom and George 1950 [synonym], Megacyclops rugosus Haughton 1932 [synonym], Megacyclops usiliensis von Huene 1942 [synonym], Megacyclops whaitsi Broom 1931 [synonym], Neomegacyclops cyclops Boonstra 1953 [synonym], Pelanomodon wesselsi Broom 1948 [synonym], Rhachiocephalus angusticeps Broom 1937 [synonym], Rhachiocephalus haughtoni Broom 1932 [synonym]
Invalid names: Dicynodon tealei Haughton 1932 [nomen dubium]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. Owen 1861 | Upper as well as lower jaws edentulous, or with inconspicuous teeth. | |
| C. F. Kammerer and K. D. Angielczyk 2009 | The data sets of Angielczyk (2007), Fröbisch (2007), and Fröbisch & Reisz (2008)include the same three autapomorphies of Cryptodontia: (1) median ridge on anterior surface of the snout; (2)nasal bosses present as paired swellings near the dorsal or posterodorsal margin of external nares; (3)postcaniniform crest present. |