Tarrasiiformes

Tarrasiiformes
Temporal range: Carboniferous
Paratarrasius hibbardi Lund and Melton Jr. 1982 from the Mississippian (Serpukhovian) Heath Formation of Bear Gulch, Montana
Scientific classification
Kingdom:
Phylum:
Class:
Order:
Tarrasiiformes
Families

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

Taxonomy

  • OrderTarrasiiformes sensu Lund & Poplin 2002 [Haplistia]
    • FamilyTarrasiidae Traquair 1881 emend. Woodward 1891
      • Genus †Apholidotos Lund ex Frickinger 1991 nomen novum
        • Species †Apholidotos ossna Lund ex Frickinger 1991 nomen novum
      • Genus †Paratarrasius Lund & Melton 1982
        • Species †Paratarrasius hibbardi Lund & Melton 1982
      • Genus †Tarrasius Traquair 1881
        • Species †Tarrasius problematicus Traquair 1881

Timeline of genera

CarboniferousDevonianGzhelianKasimovianMoscovianBashkirianSerpukhovianViséanTournaisianFamennianFrasnianGivetianEifelianEmsianPragianLochkovianPalaeophichthysParatarrasiusTarrasiusCarboniferousDevonianGzhelianKasimovianMoscovianBashkirianSerpukhovianViséanTournaisianFamennianFrasnianGivetianEifelianEmsianPragianLochkovian

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

Bibliography


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