Species that contain: Richardsonius and egregius and HYBRID [ 1 ] records

microdon, Richardsonius Snyder [J. O.] 1917:58 [Bulletin of the Bureau of Fisheries v. 35 (for 1915-16); ref. 4156] Lake Tahoe, near Tahoe City, Placer County, California, U.S.A. Holotype: USNM 75652. Paratypes: CAS-SU 22667 (2), USNM 75684 (1). Type catalog: Böhlke 1953:38 [ref. 12291], Gilbert 1998:113 [ref. 23395]. •Hybrid between Gila bicolor obesa x Richardsonius egregius -- (Gilbert 1998:113 [ref. 23395]). Hybrid. Leuciscidae. Habitat: freshwater.