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Global Range: (200,000-2,500,000 square km (about 80,000-1,000,000 square miles)) This is an unusually distributed western species found mostly from Utah to southern California, according to Discover Life, ranges from Sublette County in southern Wyoming (2004) and Butte (1965) and Cassia(1974) Counties in southern Idaho with two widely separated records in Colorado (Mesa County 1963 and Jackson County in 2002. It is widespread in Utah and southern and central Nevada, occurring in the Salt Lake area and ranging almost continuously from Sanpete (1990) and Millard Counties southwestward through Washington County (2007) across Clark County (1996) in southern Nevada, also Lander, Nye, and White Pine Counties farther north, to western Arizona (Mohave and Yuma Counties), with an isolated record well to the east in Maricopa County in 1964 at only 1309 feet (399 meters), continuing westward to southern, mostly interior, California with one record from Baja (1983) in Mexico. From there it ranges north, about equally west as east of the central valley, into central and eastern Oregon and apparently (Krombein et al., 1979) Washington. It is not listed for southeastern Arizona by Rightmyer and Griswold (2010) Some are from relatively dry, low areas, e.g. Moab Utah at 5500 feet (1676 meters), Granite Reef Dam (399 m) and Palm Canyon (1,342 (409m) to 2,119 feet (646m)) in southern Arizona, and Wild Horse Canyon at 4300 feet (1300 m) in San Bernardino County, but two from Mono County are labeled 10,000 feet (3048 m) and 3094 meters, and one from Sanpete County was at 10,760 feet (3728 m), and the Mesa County, Colorado site is about as high.


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