thayeri, Gymnocorymbus Eigenmann [C. H.] 1908:93 [Bulletin of the Museum of Comparative Zoology v. 52 (no. 6); ref. 1221] Amazonas, Tefé, rio Solimões, Brazil. Lectotype: MCZ 89969. Paralectotypes: (100) MCZ 19242 (1), 19272 (1), 20710 (2), 20720 (2), 20724 (2), 20789 (22), 20804 (1), 20807 (9), 10973 (4), 20984 (29), 20988 (10), 21001 (7), 21007 (8), 21065 (1), 89967 (1). Lectotype selected by Benine et al. 2015:20 [ref. 33792]. •Valid as Gymnocorymbus thayeri Eigenmann 1908 -- (Ortega & Vari 1986:8 [ref. 9708], Taphorn 1992:194 [ref. 23654], Benine 2002:293 [ref. 26541], Benine in Reis et al. 2003:128 [ref. 27061], Barriga Salazar 2014:107 [ref. 35745], Ramos et al. 2014:4 [ref. 35321], Sarmiento et al. 2014:184 [ref. 35004], Benine et al. 2015:17 [ref. 33792], DoNascimiento et al. 2017:46 [ref. 35633], Careaga et al. 2020:75 [ref. 37774], Meza-Vargas et al. 2021:18 [ref. 39298], Chuctaya et al. 2022:20 [ref. 42137], Koerber et al. 2022:32 [ref. 39235], Taphorn et al. 2022:14 [ref. 41297]). Current status: Valid as Gymnocorymbus thayeri Eigenmann 1908. Acestrorhamphidae: Pristellinae. Distribution: South America: Brazil, Ecuador, Bolivia, Colombia, Guyana, Peru, and Trinidad and Tobago. IUCN (2023): Least Concern. Habitat: freshwater.