Grundulinae

Astyanacinus is a monospecific genus of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American characins. The only species in the genus is Astyanacinus moorii which is found in the Upper Paraguay River basin in Bolivia and Brazil. The specific name honours the English botanist Spencer Moore who collected the holotype.

Grundulus is a genus of freshwater ray-finned fishes belonging to the family Acestrorhamphidae, the American characins. The fishes in this genus are found in Colombia and Ecuador in South America. A biogeographical analysis in 2010 found they are endemic to coldwater lakes of glacial origin in the northern Andes mountain range.