Systematic Implications of Geographic Patterns of Genetic Variation in the Genus Dicamptodon

We describe protein variation at 34 genetic loci among 23 populations of the salamander genus Dicamptodon. Four major genetic groups emerge, congruent with the four morphological groups detected by Nussbaum (1976). The genetic data confirm the specific identity of D. copei. However, recognition of I...

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Bibliographic Details
Published in:Copeia 1983-08, Vol.1983 (3), p.679-691
Main Authors: Daugherty, Charles H., Allendorf, Fred W., Dunlap, William W., Knudsen, Kathy L.
Format: Article
Language:English
Subjects:
Alleles
Biological and medical sciences
Creeks
Evolutionary genetics
Fundamental and applied biological sciences. Psychology
Genetic loci
Genetic variation
Genetics of eukaryotes. Biological and molecular evolution
Population genetics
Population genetics, reproduction patterns
Population geography
Population size
Reproductive isolation
River ports
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Summary:We describe protein variation at 34 genetic loci among 23 populations of the salamander genus Dicamptodon. Four major genetic groups emerge, congruent with the four morphological groups detected by Nussbaum (1976). The genetic data confirm the specific identity of D. copei. However, recognition of Idaho populations as D. aterrimus is warranted on the basis of equivalently great genetic divergence from Coastal-Cascade D. ensatus and D. copei. The lineage divergence time of this major phylogenetic event is estimated at 7.5 MYBP, in contrast to estimates placing it in the late Pleistocene.
ISSN:0045-8511
1938-5110
DOI:10.2307/1444332