arapaima, Gymnotus Albert [J. S.] & Crampton [W. G. R.] 2001:250, Figs. 3c, 6 [Ichthyological Exploration of Freshwaters v. 12 (no. 3); ref. 25031] 10 kilometers nw confluence Juruá and Solimões rivers, Mamirauá Reserve, 3°02'S, 64°51'W, Paraná Apara, Amazonas, Brazil. Holotype: INPA 13505. Paratypes: BMNH 1998.3.11.136-149 (14), BMNH (5 lots, 7); INPA 9963 (5), 13506 (3), 15833 (14); MCP uncat. [ex WGRC 20.180699, 15.250699] (1, 1); WGRC 16.110597 (1), 34.110597 (1), 35.110597 (1), 37.110597 (1), 38.110597 (1), 39.110597 (1), WGRC (22 lots, 22). Type catalog: Ferraris et al. 2017:[16] [ref. 35236]. •Valid as Gymnotus arapaima Albert & Crampton 2001 -- (Crampton et al. 2003:2 [ref. 27064], Albert & Crampton 2003:3 [ref. 27077], Campos-da-Paz in Reis et al. 2003:484 [ref. 27061], Crampton & Albert 2003:2 [ref. 27433], Maldonado-Ocampo & Albert 2004:2 [ref. 27978], Crampton et al. 2005:99 [ref. 28092], Milhomem et al. 2012:804 [ref. 31815], Ferraris et al. 2017:[16] [ref. 35236], see DoNascimiento et al. 2017:[14] [ref. 35679], Craig et al. 2019:24 [ref. 37060] in subgenus Gymnotus). Current status: Valid as Gymnotus arapaima Albert & Crampton 2001. Gymnotidae: Gymnotinae. Distribution: Amazon basin, Brazil. Habitat: freshwater.