Eurypterygii

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Eurypterygii
Short salmon sparrow (Magnisudis atlantica)

Short salmon sparrow ( Magnisudis atlantica )

Systematics
Subclass : Neuflosser (Neopterygii)
Subclass : Real bony fish (Teleostei)
Overcohort : Clupeocephala
Cohort : Euteleosteomorpha
Sub-cohort : Neoteleostei
Sub-cohort : Eurypterygii
Scientific name
Eurypterygii
Rosen , 1973

The Eurypterygii or Eurypterygia are a high taxon (a systematic group) of the real bony fish , to which the lizard fish relatives ( Aulopiformes) and the Ctenosquamata as well as the extinct fish family of the Cheirotricidae ( incertae sedis ) belong. The taxon was established in 1973 by the American ichthyologist Donn Rosen .

features

The group is diagnosed by five synapomorphies . The most important of these is the merging of the half of the middle ventral fin ray , which is towards the body, with the middle ventral fin radialia ( fin support ) during orthogenesis . In the adult fish there is such a hammer-like joint head. In all other real bony fish the middle radial remains independent. Another synapomorphism is the growing together of the pharyngeal tooth plate with the third epibranchial, the bone support of the upper branch of the third branchial arch. The monophyly of the Eurypterygii is also confirmed by molecular genetic studies. The Eurypterygii include over 16,000 species of fish.

The following cladogram shows the systematic position of the Eurypterygii:

  Neoteleostei  

 Deep- sea tadpoles (Ateleopodiformes)


  Eurypterygii  

 Lizardfish relatives (Aulopiformes)


  Ctenosquamata  

 Lanternfish (Myctophiformes)


   

 Acanthomorpha





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literature

  • Joseph S. Nelson : Fishes of the World . John Wiley & Sons, 2006, ISBN 0-471-25031-7 .
  • Wilfried Westheide , Reinhard Rieger: Special Zoology. Part 2: Vertebrae and Skull Animals. 1st edition, Spektrum Akademischer Verlag, Heidelberg / Berlin 2004, ISBN 3-8274-0307-3 .
  • EO Wiley & G. David Johnson: A teleost classification based on monophyletic groups. in Joseph S. Nelson, Hans-Peter Schultze & Mark VH Wilson: Origin and Phylogenetic Interrelationships of Teleosts. 2010, Verlag Dr. Friedrich Pfeil, Munich, ISBN 978-3-89937-107-9 .

Individual evidence

  1. ↑ Masaki Miya et al. (2003): Major patterns of higher teleostean phylogenies: a new perspective based on 100 complete mitochondrial DNA sequences. Molecular Phylogenetics and Evolution, Volume 26, Issue 1, January 2003, Pages 121-138 doi : 10.1016 / S1055-7903 (02) 00332-9