lunatus, Hemigrammus Durbin [M. L.] in Eigenmann 1918:164 [Memoirs of the Museum of Comparative Zoology v. 43 (pt 2); ref. 1240] Amazon River basin [Lago Badajós, Codajás, about 3°21'S, 62°41'W]. Holotype: MCZ 20964 (1 of 3). Paratypes: CAS 42679 [ex IU 12649 & MCZ 20964] (1); MCZ 20964 (2 of 3), 89963 (1, missing). Author is M. L. Durbin. Appeared first in Eigenmann 1910:436 [ref. 1224] without description. •Valid as Hemigrammus lunatus Durbin 1918 -- (Ortega & Vari 1986:8 [ref. 9708], Britski et al. 1999:39 [ref. 24147], Lasso et al. 2001:95 [ref. 25928], Lima & Oyakawa in Reis et al. 2003:132 [ref. 27061], Barriga Salazar 2014:107 [ref. 35745], Ota et al. 2014:270 [ref. 33373], Sarmiento et al. 2014:184 [ref. 35004], DoNascimiento et al. 2017:48 [ref. 35633], Koerber et al. 2017:39 [ref. 35267], Ota et al. 2019:343 [ref. 36619], Careaga et al. 2020:75 [ref. 37774], Meza-Vargas et al. 2021:18 [ref. 39298], Koerber et al. 2022:33 [ref. 39235], Lima & Marinho 2024:176 [ref. 40817]). Current status: Valid as Hemigrammus lunatus Durbin 1918. Acestrorhamphidae: Pristellinae. Distribution: South America: Amazon and Paraguay River basins in Bolivia (La Paz, Beni, Pando, Santa Cruz), Brazil (Acre, Amazonas, Pará, Rondônia, Mato Grosso), Paraguay, Ecuador (Napo), Colombia and Peru (Loreto, Madre de Dios). Habitat: freshwater.