Microsternarchus is a genus of bluntnose knifefish that is found in creeks and streams, often in areas with submerged vegetation, roots and leaf litter, in the Amazon, Orinoco, Essequibo–Rupununi and Río de la Plata basins in South America.Cox Fernandes, C., Nogueira, A., Williston, A. & Alves-Gomes, J.A. (2015): A new species of electric knifefish from the rio Negro, Amazon basin (Gymnotiformes: Hypopomidae, Microsternarchini). Proceedings of the Academy of Natural Sciences of Philadelphia, 164 (1): 213-227. The two recognized species are both small knifefish, with the largest being M. bilineatus at up to in total length. The other is M. brevis, which at up to only is the world's smallest knifefish. Microsternarchus are very similar to Brachyhypopomus.
Species There are currently 2 recognized species in this genus:
Microsternarchus bilineatus Fernández-Yépez, 1968 (Brazil, Venezuela) Microsternarchus brevis Cox Fernandes, A. Nogueira, A. D. Williston & Alves-Gomes, 2015 (Brazil)
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