tietensis, Plecostomus Ihering [R. von] 1905:559 [Annals and Magazine of Natural History (Series 7) v. 15 (no. 90) (art. 75); ref. 15388] Rio Tietê, São Paulo, Brazil. Holotype (unique): BMNH 1905.6.9.1. Type catalog: Ferraris 2007:261 [ref. 29155]. •Valid as Hypostomus tietensis (Ihering 1905) -- (Isbrücker 1980:36 [ref. 2303], Burgess 1989:432 [ref. 12860], Isbrücker 2001:28, 31 [ref. 25653], Isbrücker 2002:19 [ref. 27178], Weber in Reis et al. 2003:363 [ref. 27061], Armbruster 2004:80 [ref. 27644], Ferraris 2007:261 [ref. 29155], Zawadzki et al. 2017:13 [ref. 35355], Zawadzki et al. 2019:[11] [ref. 37170], Azevedo-Santos et al. 2020:5 [ref. 39606], Reis et al. 2020:467 [ref. 38364]). Current status: Valid as Hypostomus tietensis (Ihering 1905). Loricariidae: Hypostominae. Distribution: South America: Tietê River basin, uper Paraná River system (Brazil). Habitat: freshwater.