Testing hypotheses of speciation timing in Dicamptodon copei and Dicamptodon aterrimus (Caudata: Dicamptodontidae).
Testing hypotheses of speciation timing in Dicamptodon copei and Dicamptodon aterrimus (Caudata: Dicamptodontidae).
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测试 Dicamptodon copei 和 Dicamptodon aterrimus(有尾目:Dicamptodontidae)的物种形成时间假设。
DOI:
10.1016/j.ympev.2004.12.001
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发表时间:
2005
期刊:
影响因子:
--
通讯作者:
Sullivan,Jack
中科院分区:
文献类型:
--
作者:
Steele,CraigA;Carstens,BryanC;Storfer,Andrew;Sullivan,Jack
Giant salamanders of the genus Dicamptodon are members of the mesic forest ecosystem that occurs in the Pacific Northwest of North America. We estimate the phylogeny of the genus to test several hypotheses concerning speciation and the origin of current species distributions. Specifically, we test competing a priori hypotheses of dispersal and vicariance to explain the disjunct inland distribution of the Idaho giant salamander (D. aterrimus) and to test the hypothesis of Pleistocene speciation of Cope’s giant salamander (D. copei) using Bayesian hypothesis testing. We determined that available outgroups were too divergent to root the phylogeny effectively, and we calculated Bayesian posterior probabilities for each of the 15 possible root placements for this four-taxon group. This analysis placed the root on the branch leading to D. aterrimus, indicating that current distribution and speciation of D. aterrimus fit the ancient vicariance hypothesis and are attributable to the orogeny of the Cascade Mountains rather than recent inland dispersal. Furthermore, test results indicate that D. copei is distantly related to other coastal lineages and likely originated much earlier than the Pleistocene. These results suggest that speciation within the genus is attributable to ancient geologic events, while more recent Pleistocene glaciation has shaped genetic variation and distributions within the extant species.
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DOI:
--
发表时间:
2000
期刊:
Evolution; international journal of organic evolution
影响因子:
--
作者:
Michele F. Donovan;R. D. Semlitsch;E. Routman
通讯作者:
E. Routman
DOI:
--
发表时间:
1989
期刊:
Evolution; international journal of organic evolution
影响因子:
--
作者:
D. A. Good
通讯作者:
D. A. Good
DOI:
--
发表时间:
1989
期刊:
影响因子:
--
作者:
R. Bury;H. Lisle;P. R. Brown;B. Kaufman;Brian M. McGurty
通讯作者:
Brian M. McGurty
影响因子:
10.7
作者:
Abdo, Z;Minin, VN;Sullivan, J
通讯作者:
Sullivan, J
DOI:
--
发表时间:
1970
期刊:
影响因子:
--
作者:
Ronald A. Nussbaum
通讯作者:
Ronald A. Nussbaum