Agamyxis est un genre de poissons d'eau douce de la famille des Doradidés.
Selon World Register of Marine Species () :
Cope, 1878 : Synopsis of the fishes of the Peruvian Amazon, obtained by Professor Orton during his expeditions of 1873 and 1877. Proceedings of the American Philosophical Society, vol. 17, (n. 101, p. 673-701.