Ostariophysi
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Purple headed barbel ( Barbus nigrofasciatus ) |
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| Scientific name | ||||||||||||
| Ostariophysi | ||||||||||||
| 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:
- Tetras (Characiformes)
- Carp-like (Cypriniformes)
- Sandfish (Gonorynchiformes)
- New World Knifefish (Gymnotiformes)
- Catfish (Siluriformes)
Their phylogenetic relationships are shown in the following cladogram :
| Otomorpha |
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literature
- 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
Individual evidence
- ↑ R. Betancur-R, E. Wiley, N. Bailly, A. Acero, M. Miya, G. Lecointre, G. Ortí: Phylogenetic Classification of Bony Fishes - Version 4 (2016)