Tarrasiiformes


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

Taxonomy

  • Order †Tarrasiiformes sensu Lund & Poplin 2002
  • * 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


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from: -416 till: -411.2 color:earlydevonian text:Loch.
from: -411.2 till: -407 color:earlydevonian text:Prag.
from: -407 till: -397.5 color:earlydevonian text:Ems.
from: -397.5 till: -391.8 color:middledevonian text:Eif.
from: -391.8 till: -385.3 color:middledevonian text:Givetian
from: -385.3 till: -374.5 color:latedevonian text:Frasnian
from: -374.5 till: -359.2 color:latedevonian text:Famennian
from: -359.2 till: -345.3 color:mississippian text:Tournaisian
from: -345.3 till: -328.3 color:mississippian text:Viséan
from: -328.3 till: -318.1 color:mississippian text:Serpukhov.
from: -318.1 till: -311.7 color:pennsylvanian text:Bashkir.
from: -311.7 till: -306.5 color:pennsylvanian text:Mosc.
from: -306.5 till: -303.9 color:pennsylvanian text:K.
from: -303.9 till: -299 color:pennsylvanian text:Gzh.
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from: -416 till: -359.2 color:devonian text:Devonian
from: -359.2 till: -299 color:carboniferous text:Carboniferous
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from: -416 till: -411.2 color:earlydevonian text:Loch.
from: -411.2 till: -407 color:earlydevonian text:Prag.
from: -407 till: -397.5 color:earlydevonian text:Ems.
from: -397.5 till: -391.8 color:middledevonian text:Eif.
from: -391.8 till: -385.3 color:middledevonian text:Givetian
from: -385.3 till: -374.5 color:latedevonian text:Frasnian
from: -374.5 till: -359.2 color:latedevonian text:Famennian
from: -359.2 till: -345.3 color:mississippian text:Tournaisian
from: -345.3 till: -328.3 color:mississippian text:Viséan
from: -328.3 till: -318.1 color:mississippian text:Serpukhov.
from: -318.1 till: -311.7 color:pennsylvanian text:Bashkir.
from: -311.7 till: -306.5 color:pennsylvanian text:Mosc.
from: -306.5 till: -303.9 color:pennsylvanian text:K.
from: -303.9 till: -299 color:pennsylvanian text:Gzh.
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from: -416 till: -359.2 color:devonian text:Devonian
from: -359.2 till: -299 color:carboniferous text:Carboniferous

Tarrasius is an extinct genus of Tarasiiformes. Tarrasius problematicus 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.