sternoptychum, Nannoptopoma Schaefer [S. A.] 1996:920, Fig. 4 [Copeia 1996 (no. 4); ref. 22565] Quebrada Mariposa at Cusco-Amazonico Lodge, 12°36'S, 69°11'W, Puerto Maldonado, Tambopata, Madre de Dios, Peru. Holotype: MUSM 4097. Paratypes: FMNH 101542 (1), 101546 (1); MUSM 7551 (1); USNM 177720 (1), 216851 (1), 305600 (4), 305610 (5), 305836 (1). Type catalog: Ferraris 2007:273 [ref. 29155]. •Valid as Hypoptopoma sternoptychum (Schaefer 1996) -- (Aquino & Schaefer 2010:38 [ref. 30875], Barriga Salazar 2014:112 [ref. 35745], Sarmiento et al. 2014:162, 191 [ref. 35004], DoNascimiento et al. 2017:76 [ref. 35633]). •Valid as Nannoptopoma sternoptychum Schaefer 1996 -- (Isbrücker 2001:30 [ref. 25653], Isbrücker 2002:23 [ref. 27178], Schaefer in Reis et al. 2003:324 [ref. 27061], Ferraris 2007:273 [ref. 29155], Delapieve et al. 2018:22 [ref. 35713], Meza-Vargas et al. 2021:26 [ref. 39298]). Current status: Valid as Nannoptopoma sternoptychum Schaefer 1996. Loricariidae: Hypoptopomatinae. Distribution: South America: Amazon River basin (Bolivia, Brazil, Colombia, Ecuador and Peru). Habitat: freshwater.