cyclostoma, Crenicichla Ploeg [A.] 1986:65, Pl. 4 (middle & lower) [Beaufortia v. 36 (no. 5); ref. 8054] Tucurui, below dam, Brazil. Holotype: INPA 854. Paratypes: INPA 860 (11), 866 (2), 871 (4), 880 (22), 976 (1); ZMA 119.764 (15), 119.766-67 (2, 9). •Valid as Crenicichla cyclostoma Ploeg 1986 -- (Ploeg 1991:101 [ref. 20196], Kullander in Reis et al. 2003:627 [ref. 27061], Varella et al. 2023:2 [ref. 40273]). Current status: Valid as Crenicichla cyclostoma Ploeg 1986. Cichlidae: Cichlinae. Distribution: South America: lower Tocantins River drainage, Amazon basin, Brazil. Habitat: freshwater.