rheorubrum, Bryconops Silva-Oliveira [C.], Sabaj Pérez [M. H.], Ota [R. P.], Rapp Py-Daniel [L. H.] 2019:2, Figs. 1-4, 8 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 166 (no. 1); ref. 36769] Rapids in narrow bedrock channel of left major braid of Xingu, rio Xingu (upper Volta Grande), Altamira, Pará, Brazil, 3°16'41.56"S, 52°2'18.35"W. Holotype: INPA 57879. Paratypes: ANSP, INPA, LIA, UFOPA, ZUEC. The adjective would be rheoruber if combined with a masculine genus. •Valid as Bryconops rheoruber Silva-Oliveira, Sabaj Pérez, Ota, Rapp Py-Daniel 2019 -- (Silva-Oliveira & Lima 2024:375 [ref. 40817]). Current status: Valid as Bryconops rheoruber Silva-Oliveira, Sabaj Pérez, Ota, Rapp Py-Daniel 2019. Iguanodectidae. Distribution: South America: Xingu River basin, Pará State, Brazil. Habitat: freshwater.