insignis, Heros Heckel [J. J.] 1840:378 [Annalen des Wiener Museums der Naturgeschichte v. 2; ref. 2064] Marabitanos, Rio Negro, Amazonas, Brazil. Lectotype: NMW 24415. Paralectotypes: NMW 24416-17 (1, 1); SMF 354 [ex NMW in 1843] (1). Lectotype selected by Kullander & Silfvergrip 1991:420 [ref. 16014]. •Valid as Mesonauta insignis (Heckel 1840) -- (Kullander 1986:200 [ref. 12439], Kullander & Silfvergrip 1991:420 [ref. 16014], Chang & Ortega 1995:7 [ref. 24302], Schindler 1998:11 [ref. 23480], Lasso & Machado-Allison 2000:124 [ref. 27968], Kullander in Reis et al. 2003:639 [ref. 27061], Barriga Salazar 2014:118 [ref. 35745], Sarmiento et al. 2014:129, 189 [ref. 35004], DoNascimiento et al. 2017:100 [ref. 35633], Meza-Vargas et al. 2021:28 [ref. 39298]). Current status: Valid as Mesonauta insignis (Heckel 1840). Cichlidae: Cichlinae. Distribution: South America: Amazon River and Orinoco River basins (Bolivia, Brazil, Colombia, Ecuador, Peru and Venezuela). Habitat: freshwater.