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TABLE 2. Native fishes of the Colorado River Basin, including their current federal1egal status and historic distribution/location in the basin (Evermann and Rutter 1895; Ellis 1914; Beckman 1952; Koster 1957; Miller 1959,1961,1972; Sigler and Miller 1963; Miller and Lowe 1964; Rinne 1976; Bailey et al. 1970; Baxter and Simon 1970; Rinne and Minckley 1970; Deacon and Bradley 1972; Minckley 1973, 1979; Holden and Stalnaker 1975; Cross 1976; Moyle 1976; Joseph et al. 1977; Behnke 1979; Deacon et al. 1979; Hubbard 1980; Lee et al. 1980; MoUes 1980; Robins et al. 1980; Carothers and Minckley 1981; Parenti 1981; Behnke et al. 1982; Tyus et al. 1982; U. S. Department of the Interior 1982, 1983, 1985a-e, 1986a-e, 1987; Behnke and Benson 1983; Williams et al. 1985; Minckley et al. 1986; Stanford and Ward 1986c; Johnson 1987). X - indicates species has occurred;? - indicates presence questionable; * - indicates endemic genera, species, or subspecies. cont'd Species Zuni bluehead sucker c. (P.) d. *yarrowi Mountain sucker c. (P.) platyrhynchus Little Colorado sucker Catostomus *sp. h Razorback sucker *Xyrauchen texanus CYPRINODONTIDAEI Northern springfish *Crenichthys baileyi albivallis Pahranagat springfish *c. b. baileyi Great springfish *c. b. grandis Moapa springfish *c. b. moapae Thermal spring fish *c. b. thermophilus Railroad Valley springfish * C. nevadae Sonoran Desert pupfish Cyprinodon macularius *macularius Salton Sea pupfish C. m. *califomiensis POECILIIDAE Sonoran top minnow Poeciliopsis occidentalis occidentalis 226 Federal Historic distribution by major river drainagea legal Upper basinb Lower basinb statusC CO GR SJ CO VR LC BW GI Historic location U X restricted to upper Zuni River drainage, AZ-NM N X X headwaters of Upper Mainstem Colorado and Green river drainages, UT-WY-CO N X restricted to Little Colorado River drain- age, AZ-NM U X X X X X larger river channels of the basin; wide- spread U X restricted to isolated springs and spring- streams of pluvial White river, NV N X restricted to isolated springs and spring- streams of Pahranagat Valley, pluvial White River, NV N X restricted to isolated springs and spring- streams of Pahranagat Valley, pluvial White River, NV U X restricted to isolated springs and spring- streams of pluvial White River, NV N X restricted to isolated springs and spring- streams of pluvial White River, NV T X Railroad Valley, a former connective of the Virgin River drainage, NV E X X lower section of Lower Mainstem Colorado River and Gila River drainage E X Salton Sea Basin, CA E X moderately restricted to Gila River drain- age south into Mexico