nigrifrons, Hyphessobrycon Ahl [E.] 1936:23 [Zoologischer Anzeiger v. 114 (nos 1/2); ref. 13683] Pará, Amazonas, Brazil. Holotype (unique): ZMB 20800. Types mentioned: Paepke 1995:92 [ref. 21847], Zarske & Géry 1995:113, Fig. 9 [ref. 22674]. •Synonym of Cheirodon interruptus (Jenyns 1842) -- (Zarske & Géry 1995:119 [ref. 22674], Malabarba in Reis et al. 2003:216 [ref. 27061], Litz & Koerber 2014:11 [ref. 33622], Mirande & Koerber 2015:19 [ref. 35117]). Current status: Synonym of Cheirodon interruptus (Jenyns 1842). Characidae: Cheirodontinae. Habitat: freshwater.