yinyang, Hemigrammus Lima [F. C. T.] & Sousa [L. M. de] 2009:156, Figs. 1-3 [aqua, International Journal of Ichthyology v. 15 (no. 3); ref. 30278] Igarapé Castanha, near Sítio São Pedro, 0°11'N, 69°35'W, Amazonas, Brazil. Holotype: MZUSP 99300. Paratypes; many at ANSP, INPA, MCP, MZUSP. •Valid as Hemigrammus yinyang Lima & Sousa 2009 -- (Carvalho et al. 2010:253 [ref. 30862], Lima et al. 2016:131 [ref. 34590], DoNascimiento et al. 2017:49 [ref. 35633]). •Valid as Holopristis yinyang (Lima & Sousa 2009) -- (Melo et al. 2024:28 [ref. 41541]). Current status: Valid as Holopristis yinyang (Lima & Sousa 2009). Acestrorhamphidae: Thayeriinae. Distribution: South America: western Amazon River basin, Brazil and Colombia. Habitat: freshwater.