Hemiodontidae
| Hemiodontidae Temporal range: | |
|---|---|
| Hemiodus gracilis | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Characiformes |
| Superfamily: | Erythrinoidea |
| Family: | Hemiodontidae Bleeker, 1859 |
| Genera | |
|
See the text | |
The Hemiodontidae are a small family of freshwater characins found in northern South America, south to the Paraná-Paraguay Basin. The larger species are popular food fish.
Hemiodontids have a streamlined body shape; many are fast-swimming, and are able to leap out of the water to escape predators. The adults of all species except Micromischodus sugillatus have no teeth on their lower jaws. Most species have a round spot on the side of the midbody and a stripe along the lower lobe of the caudal fin. The largest hemiodontids are around 50 cm (20 in) in length.
Fossil remains of Hemiodus are known from the Middle Miocene-aged Pebas Formation of Peru.