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. .. . .... .. - ~ 57 UTAH ACADEMY PROCEEDINGS, VOL. 51, PART 2.1974 ~ Figure 4. Woundfin (top) and Virgin River spinedace adults. very silvery, with little other color present. The body is very streamlined, with a flat head, large subterminal mouth, barbels, and enlarged fins typical of swiftwater fishes (Figure 4). The body is essentially scaleless, spines are developed on pectoral fins, and size seldom exceeds 4 inches. Dorsal rays 8-9 (10), anal rays 9-11, pharyngeal teeth in two rows and variable from 1,5-4, 2 (Deacon and Minckley, 1973). Documentation: The original ra. of the woundfm was the Gila River system from Tempe, Arizona, to its mouth at Yuma, the main Colorado River from Yuma to the mouth of the Virgin River and up the Virgin in Nevada, Arizona, and Utah to La Verkin Spring near Hurricane, Utah (Gilbert "and Scolfield, 1898; Deacon and Minckley, 1973). Apparently it was not common in tributaries of the Virgin. It is presently found only in the Virgin River below La Verkin Spring, with the exception of one specimen from the Moapa River. Nevada (formerly a tributary of the Virgin River), taken in the late 1960s (Deacon and Minckley, 1973).The woundfin has been transplanted in several locations but is established only in Sycamore Creek, Arizona (tributary of Gila River). They were reported introduced into the Paria River, Utah and Arizona, but were not found in the spring of 1974 (Gail Kobetich, Fish and Wildlife Service, Parker, Arizona). The woundfin occupies the main channel of the swift, highly turbid, and extremely warm (90 F summer temperature) sections of the Virgin River with sandy, constantly shifting bottoms. .. . I' . .~ . .,. , .