Orthacodontidae is an extinct

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

shark Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachi ...

s in the order Synechodontiformes. It contains twelve species within three genera. Some authors included it into

Hexanchiformes The Hexanchiformes are the order consisting of the most primitive types of sharks, and numbering just seven extant species. Fossil sharks that were apparently very similar to modern sevengill species are known from Jurassic specimens. Hexanchif ...

Lamniformes The Lamniformes (, from Greek ''lamna'' "fish of prey") are an order of sharks commonly known as mackerel sharks (which may also refer specifically to the family Lamnidae). It includes some of the most familiar species of sharks, such as the grea ...

Species

* '' Occitanodus''

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, Cappetta & Adnet, 2014 ** '' Occitanodus sudrei''

, Cappetta & Adnet, 2014 * '' Orthacodus'' Woodward, 1889 ** '' Orthacodus longidens''

Agassiz Jean Louis Rodolphe Agassiz ( ; ) FRS (For) FRSE (May 28, 1807 – December 14, 1873) was a Swiss-born American biologist and geologist who is recognized as a scholar of Earth's natural history. Spending his early life in Switzerland, he rec ...

, 1843 * '' Sphenodus''

, 1843 ** '' Sphenodus alpinus'' Gümbel, 1861 ** '' Sphenodus longidens''

, 1843 ** '' Sphenodus lundgreni'' Davis, 1890 ** '' Sphenodus macer'' Quenstedt, 1852 ** '' Sphenodus nitidus'' Wagner, 1862 ** '' Sphenodus planus''

, 1843 ** '' Sphenodus rectidens'' Emmons, 1858 ** '' Sphenodus robustidens'' Seguenza, 1900 ** '' Sphenodus tithonius'' Gemmellaro, 1871 ** '' Sphenodus virgai'' Gemmellaro, 1871

References

{{Taxonbar, from=Q18358311 Jurassic sharks Cretaceous sharks Hexanchiformes Shark families Prehistoric cartilaginous fish families Callovian first appearances Selandian extinctions