Cheirodontinae

Cheirodontinae
Cheirodon interruptus
Systematics
Cohort : Otomorpha Sub-cohort : Ostariophysi Otophysa Order : Tetras (Characiformes) Family : True tetras (Characidae) Subfamily : Cheirodontinae
Scientific name
Cheirodontinae
Eigenmann , 1915

The Cheirodontinae are a subfamily of the true tetras (Characidae). It occurs in Central and South America from Costa Rica to northern Argentina and Trinidad .

features

The Cheirodontinae are very small fish that are only two to six inches long. Its characteristic features include a muscular, transparent, mostly triangular zone, the pseudotympanum, adjacent to the front part of the swim bladder . It is found in many young tetras, but is only present in the adult species of the Cheirodontinae and probably serves as a further resonance body in addition to Weber's apparatus . The teeth stand in a row in the jaw and are conical, three-pointed or palm-shaped, narrow at the base and multi-pointed and wide at the top. There are small thorns (interhemal spines) on the underside of the tail fin stalk. They are more pronounced in the males.

The species of the tribe Compsurini have internal fertilization, while the tribe Cheirodontini and the genera listed as incertae sedis have external fertilization.

Genera

Cheirodon pisciculus

Serrapinnus gracilis

Saccoderma hastata

• incertae sedis
  • Aphyocheirodon Eigenmann, 1915
  • Cheirodontops Schultz, 1944
  • Odontostilbe Cope, 1870
  • Prodontocharax Eigenmann & Pearson in Pearson, 1924
  • Pseudocheirodon Meek & Hildebrand, 1916
• Tribus Cheirodontini
  • Cheirodon Girard, 1855
  • Ctenocheirodon Malabarba & Jerep, 2012
  • Heterocheirodon Malabarba, 1998
  • Megacheirodon †
  • Nanocheirodon Malabarba, 1998
  • Serrapinnus Malabarba, 1998
• Tribe Compsurini
  • Acinocheirodon Malabarba & Weitzman, 1999
  • Compsura Eigenmann, 1915
  • Kolpotocheirodon Malabarba & Weitzman, 2000
  • Macropsobrycon Eigenmann, 1915
  • Saccoderma Schultz, 1944
• Tribe Protocheirodontini
  • Protocheirodon Vari et al., 2016

literature

• Günther Sterba : The world's freshwater fish. 2nd Edition. Urania, Leipzig / Jena / Berlin 1990, ISBN 3-332-00109-4 .
• Joseph S. Nelson : Fishes of the World . John Wiley & Sons, 2006, ISBN 0-471-25031-7 .
• J. Marcos Mirande: Weighted parsimony phylogeny of the family Characidae (Teleostei: Characiformes). Cladistics, Volume 25, Issue 6, pages 574–613, December 2009, doi : 10.1111 / j.1096-0031.2009.00262.x .

Web links

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

• Cheirodontinae on Fishbase.org (English)