Exodontinae
| Exodontinae | ||||||||||||
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Two- spotted tetra ( Exodon paradoxus ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Exodontinae | ||||||||||||
| Fowler , 1958 |
The Exodontinae are a subfamily of the South American Real tetras (Characidae). It occurs in five species in tropical South America.
features
The species of the Exodontinae are medium-sized, predatory and partially scale-eating (lepidophage) fish with body lengths of 12 to 15 cm. As Diagnostic features of the subfamily, the presence of back teeth-like teeth from the mouth protrude (adaptation to the Lepidophagie) called, and a first eye ring bone (Infra sorbic Talia), the most of the upper portion of are maxilla overlapped. The dilator fossa, a pit above the eye socket , is completely covered by the sixth infraorbitalia. The teeth on the maxillary are conical and single-pointed and are located along the antero- ventral edge of the maxillary lamella. A bony lamella between the second and third basibranchial (bone at the base of the branchial arch) is missing, as is a bony lamella above the cartilaginous fourth basibranchial.
Genera and species
There are three genera with five species that were placed in the subfamily Characinae by mid-2018 .
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Bryconexodon Géry, 1980
- Bryconexodon juruenae Géry, 1980
- Bryconexodon trombetasi Jégu, dos Santos & Ferreira, 1991
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Exodon Müller & Troschel, 1845, ( type genus )
- Two-spotted predatory tetra ( Exodon paradoxus , Müller & Troschel, 1844)
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Roeboexodon Géry, 1959
- Roeboexodon geryi Myers, 1960
- Roeboexodon guyanensis (Puyo, 1948)
supporting documents
- ↑ a b Mirande, JM (2018): Morphology, molecules and the phylogeny of Characidae (Teleostei, Characiformes). Cladistics, June 2018. doi: 10.1111 / cla.12345