piagassu, Priocharax Lopez [G. G. S.], Souza [C. S.], Reia [L.], Mantuaneli [L. A.], Morales [B. F.], Lima [F. C. T.], Oliveira [C.] & Mattox [G. M. T.] 2025:11, Figs. 1C, 3B, D, F, 4C-D, 7 [Taxonomy v. 5 (Art. 36); ref. 42251] Lago Xaviana, Rio Purus, Berurii Municipality, Amazonas State, Brazil, 4°20'18.7"S, 61°49'43.2"W. Holotype: LBP 36690. Paratypes: LBP, INPA, MZUSP, ZUEC. •Valid as Priocharax piagassu Lopez, Souza, Reia, Mantuaneli, Morales, Lima, Oliveira & Mattox 2025. Current status: Valid as Priocharax piagassu Lopez, Souza, Reia, Mantuaneli, Morales, Lima, Oliveira & Mattox 2025. Acestrorhamphidae: Tyttobryconinae. Distribution: South America: Lago Xaviana, Rio Purus basin, Amazonas State, Brazil. Habitat: freshwater.