Oligosarcus
| Oligosarcus | ||||||||||||
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Oligosarcus robustus |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Oligosarcus | ||||||||||||
| Günther , 1864 |
Oligosarcus is a genus of carnivorous tetras that in the central South America occurs (Southeast Brazil, Paraguay , Uruguay ). It is missing in the Amazon basin .
features
The Oligosarcus species are elongated and become 7.7 to 28 centimeters long. The head profile is convex or rises evenly. Their snout is pointed, the mouth is longer or the same length as the diameter of the eye. The jaws are exclusively occupied with sharp fangs. When the mouth is closed, the first canine of the lower jaw is still visible. The dorsal fin is short, sickle-shaped and lies behind the center of the body. An adipose fin is present. The caudal fin is deeply forked.
External system
Oligosarcus is not currently assigned to any subfamily. The genus belongs with three other genera to a monophyletic clade within the real tetras, which is referred to as the Bramocharax clade.
species
- Oligosarcus acutirostris Menezes, 1987
- Oligosarcus amome Almirón et al., 2015
- Oligosarcus argenteus Günther, 1864
- Oligosarcus bolivianus (Fowler, 1940)
- Oligosarcus brevioris Menezes, 1987
- Oligosarcus hepsetus (Cuvier, 1829)
- Oligosarcus itau Mirande, Aguilera & Azpelicueta, 2011
- Oligosarcus jenynsii (Günther, 1864)
- Oligosarcus longirostris Menezes & Géry, 1983
- Oligosarcus macrolepis (Steindachner, 1877)
- Oligosarcus menezesi Miquelarena & Protogino, 1996
- Oligosarcus oligolepis (Steindachner, 1867)
- Oligosarcus paranensis Menezes & Géry, 1983
- Oligosarcus perdido Ribeiro, Cavallaro & Froehlich, 2007
- Oligosarcus pintoi Amaral Campos, 1945
- Oligosarcus platensis (Messner, 1962)
- Oligosarcus planaltinae Menezes & Géry, 1983
- Oligosarcus robustus Menezes, 1969
- Oligosarcus schindleri Menezes & Géry, 1983
- Oligosarcus solitarius Menezes, 1987
- Oligosarcus varii Menezes & Ribeiro, 2015
literature
- Günther Sterba : The world's freshwater fish. 2nd Edition. Urania, Leipzig / Jena / Berlin 1990, ISBN 3-332-00109-4 .
- ^ 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
