Tetragonopterus
| Tetragonopterus | |
|---|---|
| Tetragonopterus argenteus in Peru | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Characiformes |
| Family: | Characidae |
| Subfamily: | Tetragonopterinae Gill, 1858 |
| Genus: | Tetragonopterus Cuvier, 1816 |
| Type species | |
| Tetragonopterus argenteus Cuvier, 1816
| |
Tetragonopterus is a genus of freshwater ray-finned fishes belonging to the family Characidae. This fishes in this genus are found in South America.
It is the only genus in the subfamily Tetragonopterinae. The subfamily was originally much larger as previously defined, and contained many of the genera known as "tetras". The name "tetra" derives from this former classification.