thayeria, Hemiodus Böhlke [J. E.] 1955:8, Figs. 20-21 [Notulae Naturae (Philadelphia) No. 278; ref. 12365] Rio Negro, Brazil-Colombia border, about 1°12'N, 66°51'W. Holotype (unique): CAS-SU 48146. •Valid as Hemiodus thayeria Böhlke 1955 -- (Langeani 1999:721 [ref. 23914], Langeani in Reis et al. 2003:99 [ref. 27061], Langeani & Moreira 2013:1261 [ref. 32535], DoNascimiento et al. 2017:38 [ref. 35633], Nogueira et al. 2019:803 [ref. 36655], Nogueira et al. 2020:[5] [ref. 38050], Silva et al. 2020:179 [ref. 37389], Taphorn et al. 2022:25 [ref. 41297]). Current status: Valid as Hemiodus thayeria Böhlke 1955. Hemiodontidae. Distribution: South America: Amazon, Negro, and Orinoco River basins (Brazil, Colombia, Guyana and Venezuela). Habitat: freshwater.