calhamazon, Sternarchella Lundberg [J. G.], Cox Fernandes [C.], Campos-da-Paz [R.] & Sullivan [J. P.] 2013:159, Figs. 1-2, 6A-B, 7A [Proceedings of the Academy of Natural Sciences of Philadelphia v. 162; ref. 32552] Rio Maderia, 35 km above confluence with rio Amazonas, 3°35'44.2"S, 58°57'45.8"W, depth 14-16 meters. Holotype: INPA 37898. Paratypes: Many at ANSP, CAS 234725, CUMV, FMNH, INPA, LACM, MZUSP, USNM. Type catalog: Ferraris et al. 2017:[10] [ref. 35236]. •Valid as Sternarchella calhamazon Lundberg, Cox Fernandes, Campos-da-Paz & Sullivan 2013 -- (Ivanyisky & Albert 2014:572 [ref. 35449], Ferraris et al. 2017:[10] [ref. 35236], Evans et al. 2017:13 [ref. 35357], Bernt et al. 2018:474 [ref. 35797], Meza-Vargas et al. 2021:21 [ref. 39298], Torgersen et al. 2023:775 [ref. 40692]). Current status: Valid as Sternarchella calhamazon Lundberg, Cox Fernandes, Campos-da-Paz & Sullivan 2013. Apteronotidae: Apteronotinae. Distribution: South America: deep river channels of the Amazon basin (Colombia, Peru and Brazil). Habitat: freshwater.