Phoebodontiformes is an extinct group of

elasmobranch Elasmobranchii () is a subclass of Chondrichthyes or cartilaginous fish, including sharks (superorder Selachii), rays, skates, and sawfish (superorder Batoidea). Members of this subclass are characterised by having five to seven pairs of g ...

s, known from the

Devonian The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, whe ...

and

Carboniferous The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carbonifero ...

periods. It includes the genera ''

Phoebodus ''Phoebodus'' is an extinct genus of phoebodontiform elasmobranch, known from over a dozen species found worldwide spanning the middle to late Devonian. Most species are only known from their isolated tricuspid teeth, but one species, ''Phoebodus ...

'', '' Diademodus'' and '' Thrinacodus''. ''Phoebodus'' and ''Thrinacodus'' have slender, elongate bodies. Their teeth are tricuspate (bearing three cusps). '' Jalodus'' and other members of the family Jalodontidae, which range from the Devonian to the

Triassic The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest period ...

, were formerly included in this order, but have subsequently been assigned to their own order, the Jalodontiformes.

References

{{Taxonbar, from=Q21346838 Prehistoric cartilaginous fish orders Carboniferous sharks