from Wikipedia, the free encyclopedia
Purple headed barbel (Barbus nigrofasciatus)

Purple headed barbel ( Barbus nigrofasciatus )

Class : Ray fins (Actinopterygii)
Subclass : Neuflosser (Neopterygii)
Subclass : Real bony fish (Teleostei)
Overcohort : Clupeocephala
Cohort : Otomorpha
Sub-cohort : Ostariophysi
Scientific name
Sagemehl , 1885

The Ostariophysi are a group of real bony fish (Teleostei). Their common feature is Weber's apparatus , a connection between the inner ear (labyrinth) and the swim bladder (Greek physē ) consisting of a series of bones (large ostaria ) on both sides of the spine . This serves to improve hearing, the swim bladder acts as a soundboard . The bones evolved from the first four vertebrae.

Another common feature is an alarm pheromone , which is secreted from special cells of the epidermis in the event of injuries and warns members of the same species of danger ( deterrent ).

With well over 6000 species, two thirds of all freshwater fish belong to the Ostariophysi . Only a few Ostariophysi live in the sea (with normal salinity: some catfish ).

The following orders belong to the Ostariophysi:

Their phylogenetic relationships are shown in the following cladogram :


 Herring-like (Clupeiformes)




 Sandfish (Gonorynchiformes)


 Carp-like (Cypriniformes)


 Tetras (Characiformes)


 New World Knifefish (Gymnotiformes)


 Catfish (Siluriformes)

Template: Klade / Maintenance / Style


  • Kurt Fiedler, Textbook of Special Zoology, Volume II, Part 2: Fish , Gustav Fischer Verlag Jena, 1991, ISBN 3-334-00339-6 .
  • Joseph S. Nelson , Fishes of the World , John Wiley & Sons, 2006, ISBN 0-471-25031-7 .
  • K. Saitoh, M. Miya, JG Inoue, NB Ishiguro, M. Nishida: Mitochondrial Genomics of Ostariophysan Fishes: Perspectives on Phylogeny and Biogeography ; J Mol Evol (2003) 56: 464-472 PDF

Web links

Commons : Ostariophysi  - collection of images, videos and audio files

Individual evidence

  1. R. Betancur-R, E. Wiley, N. Bailly, A. Acero, M. Miya, G. Lecointre, G. Ortí: Phylogenetic Classification of Bony Fishes - Version 4 (2016)