arapiuns, Gymnotus Kim [L. Y.], Crampton [W. G. R.] & Albert [J. S.] 2020:471, Figs. 4-6 [Copeia v. 108 (no. 3); ref. 37696] Igarapé Jararaca, 1.4 km from Comunidade Cachoeirinha do Mentai, aff. Rio Mentai, aff. Rio Arapiuns, aff. Rio Tapajos, Rio Amazonas drainage, Santarém, Brazil, 02°43'49"S, 055°35'35"W. Holotype: ZUEC 16727. Paratypes: UF, ZUEC. •Valid as Gymnotus arapiuns Kim, Crampton & Albert 2020. Current status: Valid as Gymnotus arapiuns Kim, Crampton & Albert 2020. Gymnotidae: Gymnotinae. Distribution: Brazilian Shield: Arapiuns River drainage, Amazon basin, Brazil. Habitat: freshwater.