Tarrasiiformes

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

Taxonomy

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

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