nachtigalli, Austrolebias Costa [W. J. E. M.] & Cheffe [M. M.] in Costa 2006:133, Fig. 50 [Zootaxa No. 1213; ref. 28708] Arroio Grande, road BR-116, about 32°15'S, 53°05'W, Rio Grande do Sul, Brazil. Holotype: UFRJ 6183. Paratypes: Many lots at CIMC and UFRJ. Plus non-type material. •Valid as Austrolebias nachtigalli Costa & Cheffe 2006 -- (Loureiro & García 2008:10 [ref. 30099] with question, Volcan et al. 2014:169 [ref. 33543], Bertaco et al. 2016:424 [ref. 34561], Costa et al. 2017:142 [ref. 35626] as natchigalli, Loureiro et al. 2018:11 [ref. 36240], Volcan et al. 2021:104 [ref. 38292]). •Valid as Garcialebias nachtigalli (Costa & Cheffe 2006) -- (Alonso et al. 2023:13 [ref. 40292]). Current status: Valid as Garcialebias nachtigalli (Costa & Cheffe 2006). Rivulidae: Cynolebiinae. Distribution: South America: Laguna dos Patos system, southeastern Brazil. Habitat: freshwater.