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| fossil_range =
| fossil_range =
| image = Origin of Vertebrates Fig 013.jpg
| image = Origin of Vertebrates Fig 013.jpg
| image_caption = ''[[Auchenaspis]]'' (''[[Thyestes (fish)|Thyestes]]'') ''verrucosus'', natural size. (From Woodward, ''[https://en.wikisource.org/wiki/Origin_of_Vertebrates/Chapter_I|The Origin of Vertebrates]'' 1908, Fig. 13)
| image_caption = ''[[Auchenaspis]]'' (''[[Thyestes (fish)|Thyestes]]'') ''verrucosus'', natural size. (From Woodward, ''[https://en.wikisource.org/wiki/Origin_of_Vertebrates/Chapter_I The Origin of Vertebrates]'' 1908, Fig. 13)
| regnum = [[Animal]]ia
| regnum = [[Animal]]ia
| phylum = [[Chordata]]
| phylum = [[Chordata]]

Revision as of 11:09, 21 April 2016

Thyestiida
Auchenaspis (Thyestes) verrucosus, natural size. (From Woodward, The Origin of Vertebrates 1908, Fig. 13)
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
†Osteostraci
Order:
†Thyestiida

Janvier 1996
Families

Thyestiida was an order of bony-armored jawless fish in the class Osteostraci.

Thyestiida
Thyestiida
Cladogram
The osteostracans reconstructed here belong to the major clade Cornuata, whose generalised morphology is exemplified by the zenaspidid Zenaspis (bottom left). Some highly derived head-shield morphologies are exemplified by the benneviaspidids Hoelaspis (top right) and Tauraspis (top left), or the thyestiid Tremataspis (bottom right). The latter has lost the paired fins, possibly as a consequence of an adaptation to burrowing habits.[3]

References

  1. ^ a b A new tremataspidid (Vertebrata, Osteostraci, Thyestiida) from the Devonian of northern Urals, with remarks on tannuaspidids. Elga Mark-Kurik and Philippe Janvier, Neues Jahrbuch fur Geologie und Palaontologie - Abhandlungen 01/1997; 206(3), pages 405-421
  2. ^ New data on the exoskeleton of the osteostracan genus Aestiaspis (Agnatha) from the Silurian of Saaremaa Island (Estonia) and the Severnaya Zemlya Archipelago (Russia). O. B. Afanassieva and T. Märss, Paleontological Journal February 2014, Volume 48, Issue 1, pages 74-78, doi:10.1134/S003103011401002X
  3. ^ Janvier, Philippe (1997) Osteostraci The Tree of Life Web Project.
  • The origin and early evolution of the Osteostraci (Vertebrata): A phylogeny for the Thyestiida. Robert S. Sansom, Journal of Systematic Palaeontology, Volume 6, Issue 3, 2008, pages 317-332, doi:10.1017/S1477201907002386
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