Megadontognathus
Megadontognathus is a genus of ghost knifefishes found in river rapids in tropical South America. They are brown with a stubby snout and reach about in total length.
Species
There are currently two described species in this genus:- Megadontognathus cuyuniense Francisco [Mago Leccia|Mago-Leccia], 1994
- Megadontognathus kaitukaensis Campos-da-Paz, 1999