heterochir, Gambusia Hubbs [Clark L.] 1957:3, Figs. 1, 3a, 4, 5a [Tulane Studies in Zoology v. 5 (no. 1); ref. 12146] Headwater spring of Clear Creek, 10.4 miles west of Menard, Menard County, Texas, U.S.A. Holotype: UMMZ 170936. Paratypes: (125) FMNH 61805 (7); MCZ 39684 (7); CAS-SU 46445-51 (1 ea. = 7); TNHC 3065 (?), 4652 (1); UMMZ 170937 (6); USNM 164573 (7). Type catalog: Ibarra & Stewart 1987:37 [ref. 12367], Parenti et al. 1999:7 [ref. 24072]. •Valid as Gambusia heterochir Hubbs 1957 -- (Rosen & Bailey 1963:104 [ref. 7067], Lee et al. 1980:543 [ref. 22416], Rauchenberger 1989:3 [ref. 15687], Page & Burr 1991:238 [ref. 18983], Parenti et al. 1999:7 [ref. 24072], Garrett & Edwards 2003:783 [ref. 27258], Nelson et al. 2004:103 [ref. 27807], Lucinda & Reis 2005:41 [ref. 29205], Scharpf 2007:18 [ref. 30398], Meyer et al. 2010:13 [ref. 30817], Page & Burr 2011:449 [ref. 31215], Page et al. 2013:109 [ref. 32708], Meyer 2015:71 [ref. 34698], Huber 2019:64 [ref. 36941], Page et al. 2023:145 [ref. 40505]). Current status: Valid as Gambusia heterochir Hubbs 1957. Poeciliidae: Poeciliinae. Distribution: North America: headwater springs of Clear Creek, Texas (U.S.A.). Habitat: freshwater, brackish.