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Orthacodontidae
Taxonomy
Orthacodontidae was named by de Beaumont (1960). It is not extant.
It was assigned to Lamniformes by Itoigawa (1977); and to Synechodontiformes by Duffin and Ward (1993), Rees (2000), Underwood (2006) and Stumpf and Kriwet (2019).
It was assigned to Lamniformes by Itoigawa (1977); and to Synechodontiformes by Duffin and Ward (1993), Rees (2000), Underwood (2006) and Stumpf and Kriwet (2019).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1960 | Orthacodontidae de Beaumont |
| 1977 | Orthacodontidae Itoigawa p. 128 |
| 1993 | Orthacodontidae Duffin and Ward p. 56 |
| 2000 | Orthacodontidae Rees p. 415 |
| 2006 | Orthacodontidae Underwood p. 233 |
| 2019 | Orthacodontidae Stumpf and Kriwet p. 644 |
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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. †Orthacodontidae de Beaumont 1960
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G. †Sphenodus Agassiz 1843
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†Lamna (Sphenodus) longidens Agassiz 1843
†Lamna (Sphenodus) plana Agassiz 1843
†Sphenodus alpinus Guembel 1861
†Sphenodus helveticus de Beaumont 1960
†Sphenodus longidens Agassiz 1843
†Sphenodus nitidus Wagner 1862
†Sphenodus rectidens Emmons 1858
Invalid names: Orthacodus Woodward 1889 [objective synonym]
Diagnosis
No diagnoses are available