Cynolebias
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Cynolebias porosus , the type species of the genus, the head from above and below, drawing from 1907 by Carl H. Eigenmann |
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| Scientific name | ||||||||||||
| Cynolebias | ||||||||||||
| Steindachner , 1876 |
Cynolebias is a genus of fish from the Rivulidae family, belongs to the group of the egg-laying toothcarps and occurs in eastern South America from northern Argentina ( Buenos Aires province ) to the mouth of the Amazon .
features
Cynolebias species have a more or less high, laterally flattened body, are 5 to 13.3 cm long and are in most cases brownish in color with stripes or dots on the sides of the body. Males have higher and longer dorsal and anal fins than females and the number of respective fin rays is greater in males. Cynolebias differs from the closely related genus Simpsonichthys in the presence of pelvic fins . Cynolebias species are seasonal fish , i. In other words, they inhabit bodies of water that regularly dry out, their eggs, which are sunk into the ground during spawning, go through so-called diapause and the juvenile fish only hatch when it rains at the end of the dry season.
species
Fishbase lists 19 species in the genus. There are also three species that were only newly described in October 2017 and July 2018:
- Cynolebias akroa Nielsen et al., 2018
- Cynolebias albipunctatus Costa & Brasil, 1991
- Cynolebias altus Costa, 2001
- Cynolebias attenuatus Costa, 2001
- Cynolebias elegans Costa, 2017
- Cynolebias gibbus Costa, 2001
- Cynolebias gilbertoi Costa, 1998
- Cynolebias gorutuba Costa, 2017
- Cynolebias griseus Costa, Lacerda & Brasil, 1990
- Cynolebias itapicuruensis Costa, 2001
- Cynolebias leptocephalus Costa & Brasil, 1993
- Cynolebias microphthalmus Costa & Brasil, 1995
- Cynolebias obscurus Costa, 2014
- Cynolebias ochraceus Costa, 2014
- Cynolebias oticus Costa, 2014
- Cynolebias paraguassuensis Costa, Suzart & Nielsen, 2007
- Cynolebias parietalis Costa, 2014
- Cynolebias parnaibensis Costa, Ramos, Alexandre & Ramos, 2010
- Cynolebias perforatus Costa & Brasil, 1991
- Cynolebias porosus Steindachner, 1876
- Cynolebias rectiventer Costa, 2014
- Cynolebias roseus Costa, 2014
- Cynolebias vazabarrisensis Costa, 2001
literature
- Günther Sterba : The world's freshwater fish. 2nd Edition. Urania, Leipzig / Jena / Berlin 1990, ISBN 3-332-00109-4 .
- Reinhold Bech: Egg-laying tooth carps. Neumann Verlag, Leipzig - Radebeul, 1984, VLN 151-310 / 52/84
- Costa, WJEM (2014): Six new species of seasonal killifishes of the genus Cynolebias from the São Francisco river basin, Brazilian Caatinga, with notes on C. porosus (Cyprinodontiformes: Rivulidae) . Ichthyological Exploration of Freshwaters, 25 (1): 79-96.
Web links
- Cynolebias on Fishbase.org (English)