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Sphenacodontidae
Taxonomy
Sphenacodontidae was named by Marsh (1878). It is not extant. Its type is Sphenacodon.
It was assigned to Sphenacodontiformes by Hay (1930); to Sphenacodontia by Kuhn (1946); to Pelycosauria by Berman (1977); to Eupelycosauria by Kemp (1982), Reisz (1986); to Pelycosauria by Carroll (1988); to Sphenacodontia by Olson and Beerbower (1953), Lewis and Vaughn (1965), Kuhn (1966), Haubold (1971), Currie (1977), Hopson (1991); to Eupelycosauria by Martens et al. (2005), Evans et al. (2009); and to Sphenacodontoidea by Daly (1973), Fröbisch et al. (2011).
It was assigned to Sphenacodontiformes by Hay (1930); to Sphenacodontia by Kuhn (1946); to Pelycosauria by Berman (1977); to Eupelycosauria by Kemp (1982), Reisz (1986); to Pelycosauria by Carroll (1988); to Sphenacodontia by Olson and Beerbower (1953), Lewis and Vaughn (1965), Kuhn (1966), Haubold (1971), Currie (1977), Hopson (1991); to Eupelycosauria by Martens et al. (2005), Evans et al. (2009); and to Sphenacodontoidea by Daly (1973), Fröbisch et al. (2011).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1878 | Sphenacodontidae Marsh |
| 1889 | Palaeohatteriidae Baur p. 310 |
| 1893 | Palaeohatteriidae Boulenger p. 209 |
| 1903 | Palaeohatteriidae Osborn p. 467 |
| 1925 | Pantelosauridae Huene |
| 1930 | Sphenacodontidae Hay p. 52 |
| 1937 | Dimetrodon kempae Romer p. 95 |
| 1946 | Sphenacodontidae Kuhn p. 56 |
| 1953 | Sphenacodontidae Olson and Beerbower p. 406 |
| 1962 | Eosyodon Olson p. 59 |
| 1962 | Eosyodon hudsoni Olson p. 60 figs. 27-30; pls. 13, 14 |
| 1965 | Sphenacodontidae Lewis and Vaughn p. C27 |
| 1966 | Sphenacodontidae Kuhn p. 122 |
| 1971 | Sphenacodontidae Haubold p. 34 |
| 1973 | Sphenacodontidae Daly p. 587 |
| 1977 | Sphenacodontidae Berman p. 108 |
| 1977 | Sphenacodontidae Currie p. 929 |
| 1982 | Sphenacodontidae Kemp p. 348 |
| 1986 | Sphenacodontidae Reisz p. 74 |
| 1988 | Eosyodon Carroll |
| 1988 | Sphenacodontidae Carroll |
| 1988 | Eosyodon King |
| 1991 | Sphenacodontidae Hopson p. 646 |
| 2005 | Sphenacodontidae Martens et al. |
| 2009 | Sphenacodontidae Evans et al. p. 222 |
| 2011 | Sphenacodontidae Fröbisch et al. |
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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. †Sphenacodontidae Marsh 1878
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Subfm. †Secodontosaurinae Romer and Price 1940
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G. †Secodontosaurus Romer 1936
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†Secodontosaurus obtusidens Cope 1880
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Invalid names: Dimetrodon longiramus Case 1907 [synonym], Secodontosaurus willistoni Romer 1936 [synonym]
Subfm. †Sphenacodontinae Romer 1936
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G. †Bathygnathus Leidy 1853
G. †Ctenospondylus Romer 1936
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†Ctenospondylus casei Romer 1936
†Ctenospondylus ninevehensis Berman 1978
G. †Dimetrodon Cope 1878
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†Dimetrodon angelensis Olson 1962
†Dimetrodon booneorum Romer 1937
†Dimetrodon borealis Leidy 1853
†Dimetrodon dollovianus Cope 1888
†Dimetrodon giganhomogenes Case 1907
†Dimetrodon limbatus Cope 1877
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Invalid names: Dimetrodon incisivus Cope 1878 [synonym], Dimetrodon rectiformis Cope 1878 [synonym], Dimetrodon semiradicatus Cope 1881 [synonym]
†Dimetrodon loomisi Romer 1937
†Dimetrodon milleri Romer 1937
†Dimetrodon natalis Cope 1878
†Dimetrodon occidentalis Berman 1977
†Dimetrodon teutonis Berman et al. 2001
G. †Neosaurus Nopsca 1923
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†Neosaurus cynodus Gervais 1869
Invalid names: Geosaurus Gervais 1869 [replaced]
G. †Sphenacodon Marsh 1878
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†Sphenacodon britannicus von Huene 1908
†Sphenacodon ferocior Romer 1937
†Sphenacodon ferox Marsh 1878
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Invalid names: Scoliomus puercensis Williston and Case 1913 [synonym]
Invalid names: Oxyodon von Huene 1908 [replaced]
Invalid names: Dimetrodon kempae Romer 1937 [nomen dubium], Eosyodon Olson 1962 [nomen dubium], Eosyodon hudsoni Olson 1962 [nomen dubium], Palaeohatteriidae Baur 1889 [synonym], Pantelosauridae Huene 1925 [synonym], Varanopsinae Romer 1936 [empty]
Diagnosis
No diagnoses are available