nigra, Gila Cope [E. D.] in Cope & Yarrow 1875:663, Pl. 30 (figs. 3, 3a-b) [Engineer Department, United States Army, Report upon the Geographical and Geological Explorations and Surveys west of the one hundredth Meridian v. 5 (Zoology) Chapter 6; ref. 968] Ash Creek, Pinal County and San Carlos River, Gila County, Arizona, U.S.A. Syntypes: MCZ 35963 [ex USNM 16972] (1), USNM 16972 (orig. 8, now 5), 16987 (2). Type catalog: Böhlke 1984:84 [ref. 13621], Gilbert 1998:119-120 [ref. 23395]. •Synonym of Gila intermedia (Girard 1856) -- (Gilbert 1998:120 [ref. 23395]). •Valid as Gila nigra Cope 1875 -- (Minckley & DeMarais 2000:255 [ref. 24298], Norris et al. 2003:24 [ref. 26757], Nelson et al. 2004:71 [ref. 27807], Scharpf 2005:18 [ref. 28940], Minckley & Marsh 2009:136 [ref. 31114], Page & Burr 2011:165 [ref. 31215], Page et al. 2013:71 [ref. 32708], Moran et al. 2017:1 [ref. 35521], Page et al. 2023:70 [ref. 40505]). •Synonym of Gila robusta Baird & Girard 1853 -- (Page et al. 2017:459 [ref. 35584], Carter et al. 2018:289 [ref. 35930], Copus et al. 2018:12 [ref. 36179], Suchocki et al. 2023:1 [ref. 40513]). Current status: Synonym of Gila robusta Baird & Girard 1853. Leuciscidae: Laviniinae. Habitat: freshwater.