Adontosternarchus

Adontosternarchus is a genus of ghost knifefishes found in Amazon and Orinoco river basins in tropical South America. They have blunt snouts, a dark-spotted or -mottled pattern on a pale background (however, spotting/mottling can be so dense that individuals appear almost all dark) and reach up to 18.5-32.2 cm in total length. They feed on zooplankton and can be found quite deep, with A. devenanzii recorded down to 84 m.

Species
There are currently six recognized species in this genus:


 * Adontosternarchus balaenops (Cope, 1878)
 * Adontosternarchus clarkae Mago-Leccia, Lundberg & Baskin, 1985
 * Adontosternarchus devenanzii Mago-Leccia, Lundberg & Baskin, 1985
 * Adontosternarchus duartei de Santana & Vari, 2012
 * Adontosternarchus nebulosus Lundberg & Cox Fernandes, 2007
 * Adontosternarchus sachsi (W. K. H. Peters, 1877)