formosus, Girardinus Girard [C. F.] (ex Agassiz) 1859:63 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 11; ref. 1821] Charleston, South Carolina, U.S.A. Lectotype: SMNS Z-PI-001152a. Paralectotypes: SMNS Z-PI-001152b (3) Charleston. Appeared first without distinguishing features and unavailable in Agassiz 1855:136 [ref. 20569]; description above is by Girard so he is the author of the species. On page 62 listed as Heterandria formosa Ag. (MS.). Lectotype selected by Huber 2019:78 [ref. 36941]. •Valid as Heterandria formosa (Girard 1859) -- (Rosen & Bailey 1963:130 [ref. 7067], Rosen 1979:314 [ref. 22796], Lee et al. 1980:547 [ref. 22416], Radda 1985:128 [ref. 31261], Page & Burr 1991:239 [ref. 18983], Boschung 1992:89 [ref. 23239], Knight & Hastings 1994:150 [ref. 25560], Mettee et al. 1996:481 [ref. 25836], McEachran & Fechhelm 1998:926 [ref. 23897], Fuller et al. 1999:308 [ref. 25838], Ghedotti 2000:38 [ref. 27228], Ross et al. 2001:379 [ref. 25978], Ghedotti & Wiley 2003:1157 [ref. 27019], Nelson et al. 2004:104 [ref. 27807] with author as Agassiz dating to 1855, Boschung & Mayden 2004:411 [ref. 27995] with author as Agassiz dating to 1955 [sic], Lucinda & Reis 2005:40 [ref. 29205], Scharpf 2007:19 [ref. 30398], Page & Burr 2011:450 [ref. 31215], Page et al. 2013:109 [ref. 32708], Page et al. 2013:109 [ref. 32708], Meyer 2015:126 [ref. 34698] with author as Agassiz dating to 1855, Robins et al. 2018:230 [ref. 35886] with author as Agassiz dating to 1855, Huber 2019:78 [ref. 36941], Bagley et al. 2023:319 [ref. 41241], Page et al. 2023:146 [ref. 40505]). Current status: Valid as Heterandria formosa (Girard 1859). Poeciliidae: Poeciliinae. Distribution: Eastern North America: Atlantic and Gulf Coast drainages (southeastern U.S.A.). Habitat: freshwater, brackish.