crypticus, Platyurosternarchus de Santana [C. D.] & Vari [R. P.] 2009:236, Figs. 1-3 [Copeia 2009 (no. 2); ref. 30206] Moco-Moco Creek, upper Takutu River, Rio Branco basin, north slope of Kanuku Mountains, approximately 30°18'52.95"N, 59↑39'38.69"W, approximately 16 kilometers east of Lethem, Rupununi (Region 9), Guyana. Holotype: CUMV 93433. Paratypes: ANSP 179153 (1); AUM 35545 (1); CUMV 93432 (1), 93434-37 (1, 1, 1, 1); MBUCV 10981 (1); MCZ 46889 (2, c&s), 50983 (4), 98431 (1 c&s); USNM 209203 (2). Plus non-type specimen. Type catalog: Ferraris et al. 2017:[10] [ref. 35236]. •Valid as Platyurosternarchus crypticus de Santana & Vari 2009 -- (Ferraris et al. 2017:[10] [ref. 35236], Taphorn et al. 2022:38 [ref. 41297]). Current status: Valid as Platyurosternarchus crypticus de Santana & Vari 2009. Apteronotidae: Apteronotinae. Distribution: South America: upper Branco River system, Amazon basin (Brazil and Guyana). Habitat: freshwater.