geisleri, Hemigrammus Zarske [A.] & Géry [J.] 2007:6, Figs. 1-6 [Vertebrate Zoology v. 57 (no. 1); ref. 29231] 35 kilometers northwest of Obidos Igarapé, Para, Brazil. Holotype: MTD F 30612. Paratypes: MTD and Géry private collection [MHNG?]. •Valid as Hemigrammus geisleri Zarske & Géry 2007 -- (Ota et al. 2014:278 [ref. 33373], DoNascimiento et al. 2017:48 [ref. 35633], Meza-Vargas et al. 2021:18 [ref. 39298], Lima & Marinho 2024:175 [ref. 40817]). Current status: Valid as Hemigrammus geisleri Zarske & Géry 2007. Characidae: Stethaprioninae. Distribution: South America: Amazon and Orinoco river basins (Brazil, Colombia and Peru). Habitat: freshwater.