caudimaculosus, Apteronotus de Santana [C. D.] 2003:2, Figs. 1-2 [Zootaxa No. 252; ref. 26978] Aquapap Pantanal, 19°36.64'S, 56°24.87'W, Aquidauna, Rio Novo, Brejo de Santa Sofia, Mato Grosso do Sul State, Brazil. Holotype: MZUSP 79359. Paratypes: ANSP 178659 (1), CAS 216788 (1), INHS 94260 (1), FMNH 108537 (2), GMNH 3435 (1), INPA 20066 (1), MCZ 161831 (1), MZUSP 59295-26 (22, 4), UMMZ 240249 (1), USNM 371234 (1). Type catalog: Ferraris et al. 2017:[7] [ref. 35236]. •Valid as Apteronotus caudimaculosus de Santana 2003 -- (de Santana & Crampton 2006:115 [ref. 28765], de Santana & Lehmann A. 2006:261 [ref. 28847], Triques 2007:85 [ref. 29060], Triques 2011:301 [ref. 31671], de Santana & Cox Fernandes 2012:284 [ref. 32053], de Santana & Vari 2013:592 [ref. 32777], Ferraris et al. 2017:[7] [ref. 35236], Reis et al. 2020:463 [ref. 38364] as cf. caudimaculosus). Current status: Valid as Apteronotus caudimaculosus de Santana 2003. Apteronotidae: Apteronotinae. Distribution: South America: Paraná River basin (Brazil). Habitat: freshwater.