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13 <br />R.o. oligoporus: Clover Valley Speckled Dace <br />This subspecies is confined to a single spring system on Wrights Ranch. <br />The status of this animal is unknown, and habitat surveys should be initiated. <br />R.o. robusta: Lahontan Speckled Dace <br />This subspecies inhabits several springs within the Pluvial Lake Diamond <br />drainage. It is currently known from only two locations in Diamond Valley, <br />and these populations have been impacted by exotic fish species. The popula- <br />tion at Birch Ranch Springs may be extirpated, as collections in 1978 failed <br />to produce any specimens. The populations in Monitor Valley are in excellent <br />condition, and all three localities supported high numbers as of fall, 1979• <br />The three populations present in Ruby Valley are considered to be introduced <br />from the Humboldt drainage. No recommendations are made at this time pending <br />further field collections.