phasianus, Pterolebias Costa [W. J. E. M.] 1988:658, Fig. 1 [Journal of Zoology (London) v. 215 (pt 4); ref. 14438] Lagoon at Cáceres, Rio Cuiabá [correctly Paraguay River] floodplains, Mato Grosso, Brazil. Holotype: MZUSP 38109. Paratypes: MZUSP 38110 (1 c&s), 38111 (1). •Valid as Pterolebias phasianus Costa 1988 -- (Costa 1998:77 [ref. 23792], Britski et al. 1999:139 [ref. 24147], Lazara 2001:264 [ref. 25711], Costa in Reis et al. 2003:533 [ref. 27061], Schindler 2004:71 [ref. 28034], Costa 2005:18 [ref. 28393], Sarmiento et al. 2014:187 [ref. 35004], Drawert 2023:39 [ref. 40730]). Current status: Valid as Pterolebias phasianus Costa 1988. Rivulidae: Rivulinae. Distribution: South America: middle Paraguay River basin (Bolivia and Brazil). Habitat: freshwater.