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 (7.3–12.7 in) in total length.^[2][3][4] They feed on zooplankton and can be found quite deep, with A. devenanzii recorded down to 84 m (276 ft).^[2]

Adontosternarchus
Adontosternarchus clarkae
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Gymnotiformes
Family:	Apteronotidae
Subfamily:	Apteronotinae
Genus:	Adontosternarchus M. M. Ellis, 1912[1]
Type species
Sternarchus sachsi Peters, 1877[1]

Species

There are currently six recognized species in this genus:^[3][4]

• Adontosternarchus balaenops (Cope, 1878)
• Adontosternarchus clarkae Mago-Leccia, Lundberg & Baskin, 1985
• Adontosternarchus devenanzii Mago-Leccia, Lundberg & Baskin, 1985
• Adontosternarchus duartei de Santana & Vari, 2012^[4]
• Adontosternarchus nebulosus Lundberg & Cox Fernandes, 2007
• Adontosternarchus sachsi (W. K. H. Peters, 1877)