Amarynthis is a monotypic genus of butterflies in the family Riodinidae. Its sole species, Amarynthis meneria, the meneria metalmark, is a common species in lowland rainforests east of the Andes from Venezuela, Suriname and Guyana, south through the Brazilian Amazon to Peru and northern Argentina.

The wings are very delicate; the veins deviate from those of Amblygonia only by the 3rd subcostal vein not rising immediately before the cell-end, but immediately behind it. It is black with a narrow red transverse band and sparse light, small dots:in the cell of the forewing a red cuneiform streak, behind it a small red spot.