decaradiatus, Trachelyichthys Mees [G. F.] 1974:112, Fig. 31 [Zoologische Verhandelingen (Leiden) No. 132; ref. 2969] Karanambo area, Rupununi, Guyana. Holotype (unique): BMNH 1971.7.29.30. Type catalog: Ferraris 2007:78 [ref. 29155]. •Valid as Trachelyichthys decaradiatus Mees 1974 -- (Greenfield & Glodek 1977:55 [ref. 7054], Burgess 1989:241 [ref. 12860], Ferraris in Reis et al. 2003:477 [ref. 27061], Ferraris 2007:78 [ref. 29155], Akama & Ferraris 2011:59 [ref. 31467], Birindelli 2014:535 [ref. 33501], DoNascimiento et al. 2017:87 [ref. 35633], Calegari et al. 2019:[87] [ref. 36961], Silvano et al. 2020:220 [ref. 38135]). Current status: Valid as Trachelyichthys decaradiatus Mees 1974. Auchenipteridae: Auchenipterinae. Distribution: South America: Orinoco and Amazon basins: Brazil, Colombia and Guyana. Habitat: freshwater.