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Orthacodidae
Taxonomy
Orthacodidae was named by Glikman (1957).
It was assigned to Hexanchiformes by Villalobos-Segura et al. (2025).
It was assigned to Hexanchiformes by Villalobos-Segura et al. (2025).
Subtaxa
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1957 | Orthacodidae Glikman p. 117 |
| 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 |
| 2025 | Orthacodidae Villalobos-Segura et al. p. 4 |
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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. †Orthacodidae Glikman 1957
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G. †Archaeogracilidens Villalobos-Segura et al. 2025
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†Archaeogracilidens macer Quenstedt 1851
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Invalid names: Oxyrhina ornati Quenstedt 1851 [synonym], Sphenodus nitidus Wagner 1862 [synonym]
Invalid names: Orthacodontidae de Beaumont 1960 [objective synonym]
Diagnosis
No diagnoses are available