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

• Sepkoski, Jack (2002). . Bulletins of American Paleontology. 363: 1–560.

External links