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A new tremataspidid (Vertebrata, Osteostraci, Thyestiida) from the Devonian of northern Urals, with remarks on tannuaspidids
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* †[[Tannuaspididae]]<ref name=Mark-Kurik>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</ref>
* †[[Thyestiidae]]
* †[[Thyestiidae]]
* †[[Tremataspididae]]
* †[[Tremataspididae]]
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|2=''[[Tremataspis]]''}}
|2=''[[Tremataspis]]''}}
|2={{clade
|2={{clade
|1=''[[Dobraspis]]''
|1=''[[Dobraspis]]''<ref name=Mark-Kurik/>
|2={{clade
|2={{clade
|1=''[[Sclerodus]]''
|1=''[[Sclerodus]]''
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{{reflist}}
{{reflist}}
* 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}}
* 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}}
* 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


== External links ==
== External links ==

Revision as of 09:21, 21 April 2016

Thyestiida
The Origin of Vertebrates 1908 Fig. 13.— Auchenaspis (Thyestes) verrucosus, natural size. (From Woodward.)
Scientific classification
Kingdom:
Phylum:
Class:
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.[2]

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. ^ 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