Tarrasiiformes

Tarasiiformes is an extinct order of prehistoric ray-finned fish.[1]

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

Taxonomy
  • Order †Tarrasiiformes sensu Lund & Poplin 2002 [Haplistia][2][3][4]
    • Family †Tarrasiidae 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.[5][6] It is not considered a transitional fossil though, but an extreme example of convergent evolution.

See also

Bibliography
  • Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology. 363: 1–560. Retrieved 2011-05-17.

References
  1. Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology. 363: 1–560. Retrieved 2009-02-27.
  2. Haaramo, Mikko (2007). "Chordata – lancets, tunicates, and vertebrates". Mikko's Phylogeny Archive. Retrieved 30 December 2016.
  3. Nelson, Joseph S.; Grande, Terry C.; Wilson, Mark V. H. (2016). Fishes of the World (5th ed.). John Wiley & Sons. ISBN 978-1-118-34233-6.
  4. van der Laan, Richard (2016). "Family-group names of fossil fishes". {{cite journal}}: Cite journal requires |journal= (help)
  5. Lauren Cole Sallan (23 May 2012). "Tetrapod-like axial regionalization in an early ray-finned fish". Proceedings of the Royal Society B. 279 (1741): 3264–3271. doi:10.1098/rspb.2012.0784. PMC 3385743. PMID 22628471.
  6. "Human-Like Spine Morphology Found in Aquatic Eel Fossil". Science Daily. May 22, 2012.
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