armatus, Callichthys Günther [A.] 1868:476 [Annals and Magazine of Natural History (Series 4) v. 1 (no. 6) (art. 56); ref. 1992] Río Huallaga, Amazon system, Peru. Lectotype: BMNH 1867.6.13.51. Paralectotypes: BMNH 1867.6.13.52 (1), 1867.6.13.30 (1); ZMA 109952 [ex BMNH 1867.6.13.31] (1). Type catalog: Nijssen et al. 1982:40 [ref. 19236], Ferraris 2007:113 [ref. 29155]. Also appeared in Günther 1868:230, Fig. 1 [ref. 5756]. Lectotype selected by Nijssen & Isbrücker 1908:194 [ref. 6910]. •Valid as Corydoras armatus (Günther 1868) -- (Ortega & Vari 1986:16 [ref. 9708], Burgess 1989:365 [ref. 12860], Lasso et al. 2001:98 [ref. 25928], Isbrücker 2001:221 [ref. 26805], Reis in Reis et al. 2003:295 [ref. 27061], Britto & Lima 2003:89 [ref. 27314], Ferraris 2007:113 [ref. 29155], Barriga Salazar 2014:111 [ref. 35745], Sarmiento et al. 2014:190 [ref. 35004], Tencatt & Ohara 2016:[12] [ref. 34353], Tencatt et al. 2016:[16] [ref. 34388], see DoNascimiento et al. 2017:[16] [ref. 35679], Bogotá-Gregory et al. 2020:1401 [ref. 37878], Careaga et al. 2020:77 [ref. 37774], Meza-Vargas et al. 2021:25 [ref. 39298]). •Valid as Hoplisoma armatum (Günther 1868) -- (Dias et al. 2024:26 [ref. 41219]). Current status: Valid as Hoplisoma armatum (Günther 1868). Callichthyidae: Corydoradinae. Distribution: South America: upper Amazon River basin (Ecuador, Peru, Colombia and Bolivia). Habitat: freshwater.