microdon, Cheirodon Eigenmann [C. H.] 1915:80, Fig. 29; Pl. 14 (fig. 1) [Memoirs of the Carnegie Museum v. 7 (no. 1); ref. 1231] Cáceres, Upper Rio Paraguay, Brazil. Holotype: FMNH 57867 [ex CM 6850]. Paratypes: CAS 59783 [ex IU 14107, CM 6851] (1), FMNH 57868 (1). Type catalog: Henn 1928:58 [ref. 12305], Ibarra & Stewart 1987:23 [ref. 12367]. •Valid as Odontostilbe microdon (Eigenmann 1915) -- (Britski et al. 1999:47 [ref. 24147]). •Valid as Cheirodon microdon Eigenmann 1915 -- (Jerep & Malabarba 2014:307 [ref. 33376], Malabarba & Jerep 2014:58 [ref. 33440], Jerep et al. 2016:296 [ref. 34362]). •Valid as Serrapinnus microdon (Eigenmann 1915) -- (Malabarba 1998:215 [ref. 23844], Malabarba & Weitzman 1999:429 [ref. 24417], Malabarba in Reis et al. 2003:219 [ref. 27061], López et al. 2003:30 [ref. 27366], Menni 2004:78 [ref. 28131], Sarmiento et al. 2014:185 [ref. 35004], Mirande & Koerber 2015:19 [ref. 35117], Koerber et al. 2017:31 [ref. 35267]). Current status: Valid as Serrapinnus microdon (Eigenmann 1915). Characidae: Cheirodontinae. Distribution: Paraguay River basin: Argentina, Brazil, Bolivia and Paraguay. Habitat: freshwater.