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MORPHOMETRY OF SCULPINS (COTTUS) IN THE CLEARWATER DRAINAGE, IDAHO
O. Eugene Maughan
The Great Basin Naturalist
Vol. 38, No. 1 (March 31, 1978), pp. 115-122
Stable URL: http://www.jstor.org/stable/41711622
Page Count: 8
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The morphometry of four Idaho species of Cottidae were compared. Pectoral ray counts allowed separation of Cottus beldingi and C. confusus from C. bairdi and C. rhotheus but not from each other. Preopercular armature also allowed identification of the same two groups of two species. Palatine tooth development generally allowed separation of each species as did body prickle development. Body ratios involving caudal peduncle depth allowed separation of C. rhotheus and C. bairdi. Development of lateral lines allowed differentiation of C. rhotheus from the other three species. A key was developed based on the combination of characters studied.
The Great Basin Naturalist © 1978 Monte L. Bean Life Science Museum, Brigham Young University