diagonicus, Hemigrammus Mendonça [M. B.] & Wosiacki [W. B.] 2011:211, Figs. 1-2 [Copeia 2011 (no. 2); ref. 31415] Lago do Piranha, Juruti, Lower Amazon, 2°12'40.2"S, 56°06'59.1''W, Pará State, Brazil. Holotype: MPEG 10321. Paratypes: INPA 34093 (1); MPEG 10307 (2), 10308 (1), 10311 (2 c&s), 17382 (3 + 1 c&s). •Valid as Hemigrammus diagonicus Mendonça & Wosiacki 2011. Current status: Valid as Hemigrammus diagonicus Mendonça & Wosiacki 2011. Characidae: Stethaprioninae. Distribution: Balaio and Piranha lakes, lower Amazon River, Pará State, Brazil. Habitat: marine.