Tarrasiiformes

Tarasiiformes is an extinct order of prehistoric ray-finned fish.

Taxonomy Order †Tarrasiiformes sensu Lund & Poplin 2002 [Haplistia] Family †Tarrasiidae Traquair 1881 emend. Woodward 1891 Genus †Apholidotos Lund ex Frickinger 1991 Species †Apholidotos ossna Lund ex Frickinger 1991 Genus †Paratarrasius Lund & Melton 1982 Species †Paratarrasius hibbardi Lund & Melton 1982 Genus †Tarrasius Traquair 1881 Species †Tarrasius problematicus Traquair 1881

Timeline of genera

Tarrasius is an extinct genus of Tarasiiformes. Tarrasius problematicus (of Mississippian origin, ~ 350 Ma) featured a fully regionalized tetrapod-like spine divided into 5 distinct segments. It is not considered a transitional fossil though, but an extreme example of convergent evolution.

See also

Prehistoric fish List of prehistoric bony fish Convergent evolution

Bibliography

References

External links Bony fish in the online Sepkoski Database