Halecostomi

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Halecostomi
The bald pike or mudfish (Amia calva) is the only recent species of the bald pike (Amiiformes)

The bald pike or mudfish ( Amia calva ) is the only recent species of the bald pike (Amiiformes)

Systematics
Trunk : Chordates (chordata)
Sub-stem : Vertebrates (vertebrata)
Superclass : Jaw mouths (Gnathostomata)
Class : Ray fins (Actinopterygii)
Subclass : Neuflosser (Neopterygii)
without rank: Halecostomi
Scientific name
Halecostomi
Regan , 1923

The Halecostomi are a group of bony fish within the ray fins . Originally it comprised two families of original, extinct real bony fish (Teleostei), the Pholidophoridae and Oligopleuridae . In the modern, kladistisch embossed Scheme they form, as in the following Kladogramm shown, the common group from Kahl Hecht-like (Amiiformes) and genuine bony fish, that include a much larger number of subtaxa a.

  Ray fins (Actinopterygii)  
  Actinopteri  
  Neuflosser  (Neopterygii)  
  Halecostomi  

 Real bony fish (Teleostei)


   

 Northern pike (Amiiformes)



   

 Bake fish (Lepisosteiformes)



   

 Sturgeon (Acipenseriformes)



   

 Flösselhechte (Polypteriformes)



Template: Klade / Maintenance / Style

Molecular genetic analyzes of the relationships between the ray fins, however, have shown that the bald pike ( Amia calva ) is more closely related to the bonefish (Lepisosteidae) than to the real bonefish. The name Holostei (bone organoids) , which is also already used in the classical system, is used for this common grouping of the bald and boned pike . Should this group exist in future analyzes, the name Halecostomi would become obsolete.

The result of the molecular analyzes was confirmed by a comparative study of the skeletal anatomy of original new fins (Neopterygii) including fossil taxa.

Individual evidence

  1. ^ A b C. Tate Regan: The Skeleton of Lepidosteus with remarks on the origin and evolution of the lower Neopterygian Fishes . In: Proceedings of the General Meetings for Scientific Business of the Zoological Society of London . 1923, p. 445-461 ( Biodiversity Heritage Library ).
  2. ↑ Thomas J. Near, Ron I. Eytan, Alex Dornburg, Kristen L. Kuhn, Jon A. Moore, Matthew P. Davis, Peter C. Wainwright, Matt Friedman, W. Leo Smith: Resolution of ray-finned fish phylogeny and timing of diversification . In: PNAS . tape 109 , no. 34 , 2012, p. 13698-13703 , doi : 10.1073 / pnas.1206625109 .
  3. ↑ Lance Grande: An Empirical Synthetic Pattern Study of Gars (Lepisosteiformes) and Closely Related Species, Based Mostly on Skeletal Anatomy. The Resurrection of Holostei . In: The American Society of Ichthyologists and Herpetologists Special Publication . 6 (Supplementum for the 2010 Copeia year), 2010, p. 1-871 .

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