piorskii, Hyphessobrycon Guimarães [E. C.], Brito [P. S. de], Feitosa [L. M.], Carvalho-Costa [L. F.] & Ottoni [F. P.] 2018:86, Figs. 1-5 [ZooKeys No. 765; ref. 35965] Stream at the Anapurus municipality, Maranhão State, Brazil, 03°40'14"S, 43°07'10"W. Holotype: CICCAA 00695. Paratypes: CICCAA, CPUFMA, UFRJ. •Valid as Hyphessobrycon piorskii Guimarães, Brito, Feitosa, Carvalho-Costa & Ottoni 2018 -- (Guimarães et al. 2019:351 [ref. 36774], Guimarães et al. 2020:106 [ref. 37899], Koerber et al. 2022:34 [ref. 39235], Vieira et al. 2023:17 [ref. 40759]). Current status: Valid as Hyphessobrycon piorskii Guimarães, Brito, Feitosa, Carvalho-Costa & Ottoni 2018. Characidae: Stethaprioninae. Distribution: South America: upper Munim and Preguiças river basins (Maranhão, northeastern Brazil). Habitat: freshwater.