summus, Characidium Zanata [A. M.] & Ohara [W. M.] 2015:369, Figs. 1a, 2-3 [Zootaxa 4021 (no. 2); ref. 33970] Rondônia, Guajará-Mirim, upper rio Pacaás Novos, rio Madeira basin, Brazil, 10°50'46.29"S, 63°37'47.29"W. Holotype: MZUSP 116954. Paratypes: INPA, MNRJ, MZUSP, UFRO. •Valid as Characidium summum Zanata & Ohara 2015 -- (Zanata & Ohara 2020:8 [ref. 38004]). Current status: Valid as Characidium summum Zanata & Ohara 2015. Crenuchidae: Characidiinae. Distribution: Upper rio Pacaás Novos, rio Madeira basin, Rondônia, Brazil. Habitat: freshwater.