RED RIVER PUPFISH, CYPRINODON RUBROFLUVIATILIS (FOWLER), IN

The Red River pupfish is common in the sandy-bottomed rivers and streams of the Red River drainage in southwestern Oklahoma. R. J. Miller and H. W. Robison (1) have indicated that this species was limited to the Red River drainage in Oklahoma and there is no known record of this fish being collected in the Arkansas River drainage before 1969. The first indication that this species occurs in the South Canadian River drainage was when several small specimens were collected in 1969 by B. B. Moser (personal communication, Oklahoma Department of Wildlife Conservation) from a small tributary of the river 7 miles northwest of Ada, Oklahoma, in Pontotoc County (Section 5, T-5-N, R-4-E). Attempts to find this site and make additional collections have been unsuccessful. The first known collection of this species in the Arkansas River drainage was by F. B. Cross (personal communication) on April 22, 1972, from a small, clear, braided channel of the Canadian River at Texas Highway 70 in Robert County, Texas. The single specimen was catalogued into the Kansas University Museum of Natural History as KU14707. On May 21, 1981, two specimens of the Red River pupfish were collected by the Biotrend Survey Team from the Oklahoma State Department of Health (OSDH) from a backwater channel of the South Canadian River south of Wanette (Section 12, T-5-N, R-2-E) in Pottawatomie County. This is the firs