Species that contain: Psectrogaster and essequibensis [ 1 ] records essequibensis, Curimatus Günther [A.] 1864:291 [Catalogue of the fishes in the British Museum v. 5; ref. 1974] Essequibo River, Guyana. Lectotype: BMNH 1864.1.21.61. Paralectotypes: BMNH 1864.1.21.62 (1). Lectotype selected by Vari 1989:15 [ref. 13548]. •Valid as Psectrogaster essequibensis (Günther 1864) -- (Ortega & Vari 1986:11 [ref. 9708], Vari 1989:13 [ref. 13548], Vari in Reis et al. 2003:58 [ref. 27061], Barriga Salazar 2014:105 [ref. 35745], Sarmiento et al. 2014:64, 186 [ref. 35004], DoNascimiento et al. 2017:42 [ref. 35633], Careaga et al. 2020:76 [ref. 37774], Meza-Vargas et al. 2021:15 [ref. 39298], Taphorn et al. 2022:23 [ref. 41297]). Current status: Valid as Psectrogaster essequibensis (Günther 1864). Curimatidae. Distribution: South America: Essequibo and Amazon River basin (Bolivia, Brazil, Guyana and Peru). Habitat: freshwater.
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