similis, Corydoras Hieronimus [H.] 1991:39, Fig. 1 [Zeitschrift für Fischkunde v. 1 (no. 1); ref. 20044] Tributary of Rio Madeira, vicinity of city of Ariqumes, Rondonia State, Brazil. Holotype: ZFMK 16400. Paratypes: ZFMK 16401-02 (1, 1), uncat. (2); ZMA (1). Type catalog: Ferraris 2007:124 [ref. 29155], Herder et al. 2010:121 [ref. 31087]. •Valid as Corydoras similis Hieronimus 1991 -- (Burgess & Finley 1996:168 [ref. 22901], Isbrücker 2001:235 [ref. 26805], Reis in Reis et al. 2003:303 [ref. 27061], Ferraris 2007:124 [ref. 29155], Tencatt & Pavanelli 2015:294 [ref. 35434], Tencatt & Ohara 2016:[13] [ref. 34353], Tencatt & Evers 2016:[12] [ref. 34387], Tencatt et al. 2016:[18] [ref. 34388]). •Valid as Hoplisoma simile (Hieronimus 1991) -- (Dias et al. 2024:27 [ref. 41219] as similis). Current status: Valid as Hoplisoma simile (Hieronimus 1991). Callichthyidae: Corydoradinae. Distribution: South America: Madeira River basin, Brazil. Habitat: freshwater.