nijsseni, Crenicichla Ploeg [A.] 1991:47, Fig. 41 [South American Crenicichla; ref. 20196] Açude Carlos Simao, Rio Branco, Rio Japurá system, Acre, Brazil. Holotype: MZUSP 40163. Paratypes: INPA 2899 (17); MZUSP 38532 (4); ZMA 120352 (1), 120400 (6). •Synonym of Crenicichla proteus Cope 1872 -- (Kullander in Reis et al. 2003:630 [ref. 27061], Varella et al. 2018:384 [ref. 35777]). •Synonym of Saxatilia proteus (Cope 1872) -- (Varella et al. 2023:4 [ref. 40273]). Current status: Synonym of Saxatilia proteus (Cope 1872). Cichlidae: Cichlinae. Habitat: freshwater.