maculicauda, Hyphessobrycon Ahl [E.] 1936:22 [Zoologischer Anzeiger v. 114 (nos 1/2); ref. 13683] Central Brazil [aquarium import]. Holotype (unique): ZMB (not found). Type mentioned: Paepke 1995:92 [ref. 21847], Zarske & Géry 1995:113 [ref. 22674]. •Questionably valid as Hyphessobrycon maculicauda Ahl 1936 -- (Zarske & Géry 1995:119 [ref. 22674]). •Valid as Hyphessobrycon maculicauda Ahl 1936 -- (Lima & Malabarba in Reis et al. 2003:138 [ref. 27061]). •Species inquirenda -- (Toledo-Piza et al. 2024:287 [ref. 40817]). Acestrorhamphidae: Hyphessobryconinae. Habitat: freshwater.