Rank MethodExpertise without calculation
Review Date2012-01-23
Change Date2000-02-16
Edition Date2012-01-23
Edition AuthorsHammerson, G.
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Number of Occurrences81 - 300
Range Extent CommentsRange includes Lake Erie and Mississippi River basins, from southeastern Michigan and Ohio to eastern Wyoming, and southward to Tennessee and northern Texas; Gulf of Mexico drainages (Trinity River to San Antonio River) of Texas, mostly on the Edwards Plateau (Page and Burr 2011).
Subspecies pulchellum (Ceas 1997): Trinity, Brazos, Colorado, and Guadalupe river systems on the "Comannche" and Edwards plateaus southeastward to the Balcones Escarpment in Texas; northern tributaries of the Red River from the Wachita Mountains eastward to the Little River in Arkansas; the North Canadian River system in western Oklahoma; the Arkansas River system near Garden City, Kansas, to the Ozark escarpment west of Little Rock, Arkansas (except for streams draining the Springfield Plateau, but including the upper Neosho River system in the Flint Hills of eastern Kansas before it enters the Springfield Plateau), the Bayou des Arc and Little Red river systems of the lower White River, Arkansas; the Republican-Kansas river system of Kansas, eastern Colorado, and southern Nebraska; and the North Platte River of western Nebraska.
Subspecies squamosum (Ceas 1997, Miller and Robison 2004): endemic to the Springfield Plateau; occurs in the Spring-Grand river system in northeastern Oklahoma, southeastern Kansas, northwestern Arkansas, and southwestern Missouri, and in the Illinois River system of northeastern Oklahoma and northwestern Arkansas.
Subspecies spectabile (Ceas 1997): east of the Mississippi river, occurs in Illinois, Indiana, Michigan, Ohio, and western Tennessee (Obion River, Obion County); and nearly all stream systems in Kentucky exclusive of the Cumberland, Dix (Kentucky drainage), Green, Salt, and Tennessee river systems; west of the Mississippi River, occurs in the Osage River system in Missouri and Kansas, the Gasconade, Meramec, and St. Francis river systems in Missouri, and other smaller streams in Iowa and Missouri that drain directly into the Mississippi or lower Missouri rivers; populations in the Missouri River system from the confluence of the Missouri and Osage rivers in Missouri to the Wakarusa River, Douglas County, Kansas, represent a large contact zone of E. s. pulchellum x E. s. spectabile intergrades.