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Differentiation of the Larvae of Members of the Rana pipiens Complex in Nebraska
John K. Korky
Vol. 1978, No. 3 (Aug. 10, 1978), pp. 455-459
Stable URL: http://www.jstor.org/stable/1443611
Page Count: 5
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This study is focused on larvae of members of the Rana pipiens complex currently recognized in Nebraska, R. blairi and R. pipiens. Five hundred and forty tadpoles in different stages of development from 18 different localities were examined regarding external morphology and the data tested for significant differences between species for twenty-eight varying characters. The larvae of Rana blairi and R. pipiens from Nebraska may be distinguished by the shape of the body in dorsal view and position of the oral disc in lateral view. The larvae significantly differ in four of the twenty-eight varying characters examined: interocular distance; internareal distance; number of upper tooth-rows; and the ratio dorsal fin height/ventral fin height.