duccis, Magosternarchus Lundberg [J. G.], Cox Fernandes [C.] & Albert [J. S.] in Lundberg et al. 1996:664, Fig. 2 [Copeia 1996 (no. 3); ref. 22227] Rio Branco, 3-11 kilometers upriver from confluence with Rio Negro, 1°17'S, 61°51'W, Roraima State, Brazil, depth 6-7 meters. Holotype: MZUSP 48439. Paratypes: ANSP 173506 (1); FMNH 105093 (1); INPA 8533 (2), 10444-45 (1, 1); MCP 17698 (1); MZUSP 48440 (2), 48457 (1); USNM 337449 (2). Type catalog: Ferraris et al. 2017:[11] [ref. 35236]. •Valid as Magosternarchus duccis Lundberg, Cox Fernandes & Albert 1996 -- (Albert 2001:110 [ref. 25614], Albert in Reis et al. 2003:499 [ref. 27061]). •Valid as Sternarchella duccis (Lundberg, Cox Fernandes & Albert 1996) -- (Ivanyisky & Albert 2014:572 [ref. 35449], Ferraris et al. 2017:[11] [ref. 35236], Evans et al. 2017:16 [ref. 35357], Meza-Vargas et al. 2021:21 [ref. 39298]). Current status: Valid as Sternarchella duccis (Lundberg, Cox Fernandes & Albert 1996). Apteronotidae: Apteronotinae. Distribution: South America: deep river channels of the Amazon River basin, (Peru and Brazil). Habitat: freshwater.