@article {26,
	title = {Molecular evidence for Pleistocene glacial cycles driving diversification of a North American desert spider, Agelenopsis aperta},
	journal = {Molecular Ecology},
	volume = {13},
	year = {2004},
	note = {ZOOR14101006872},
	month = {2004},
	pages = {3453-3465},
	abstract = {The influence of historical climatic vs. geological changes on species diversification patterns was investigated in a widely distributed North American desert spider, Agelenopsis aperta (Araneae: Agelenidae), with particular reference to Pleistocene glacial cycles and earlier patterns of mountain building. Levels of sequence divergence obtained from the mitochondrial gene, cytochrome oxidase I, dated to the Pleistocene, eliminating Rocky Mountain orogeny as a cause of diversification, as orogeny ended 4 million years ago. The results of phylogenetic and network analyses showed the presence of three geographically defined clades, which were consistent with the presence of at least three glacial refugia: (i) east of the Rocky Mountains; (ii) between the Rocky Mountains and Sierra Nevadas; and (iii) west of the Sierra Nevadas. In addition, populations within the Rocky Mountains exhibited significantly lower genetic diversity than populations east of the Rocky Mountains and the haplotypes found within the Rockies were a subset of eastern haplotypes. These patterns suggest that a post-Pleistocene range expansion occurred out of an eastern glacial refugium into the Rocky Mountains. Examination of phylogeographical studies of other North American desert taxa indicated that mountain building explained diversification patterns more effectively for some taxa but Pleistocene climate change was more important for others, including A. aperta.},
	keywords = {Abiotic factors, Agelenopsis aperta (Araneae): [Fossil]., Agelenopsis aperta [Enzymes / Cytochrome oxidase I mtDNA gene sequence /, Biochemistry, Caenozoic, Diversification patterns, diversification patterns] [North America / / ] [Pleistocene / / ]., Evolution, Genetics, Geological time periods, influence of climatic vs geological, influences] [Molecular genetics / / ] [Population genetics / /, Land zones, molecular evidence] [Biochemical variation / / Cytochrome oxidase I, mtDNA sequences] [Climate and weather / / Influence on diversification, Nearctic region, patterns] [Geophysical events / / Geological influences on, Physical factors, Proteins, Quaternary, Variation},
	isbn = {0962-1083},
	url = {<Go to ISI>://ZOOREC:ZOOR14101006872},
	author = {Ayoub, Nadia A. and Riechert, Susan E.}
}
@article {27,
	title = {Speciation history of the North American funnel web spiders, Agelenopsis (Araneae: Agelenidae): phylogenetic inferences at the population-species interface},
	journal = {Molecular Phylogenetics and Evolution},
	volume = {36},
	year = {2005},
	note = {ZOOR14110057613},
	month = {2005},
	pages = {42-57},
	abstract = {Intra- and interspecific relationships of 12 out of 13 described species as well as a potential new species in the spider genus Agelenopsis (Araneae: Agelenidae) were analyzed using sequence data from two mitochondrial genes, cytochrome oxidase I (COI) and 16S ribosomal RNA. Approximately half of the species examined formed well-supported monophyletic groups, whereas the rest of the species were part of well-supported monophyletic species groups. Rather than viewing cases where species were not identified as being monophyletic as poor taxonomy, these cases more likely represent recent speciation and offer insights into the process of speciation. The clade with the lowest levels of interspecific sequence divergence was found in eastern North America, whereas western species displayed much higher levels of interspecific divergence. These patterns appear to extend below the species level as well, with southwestern species exhibiting the highest levels of intraspecific sequence divergence and geographic structuring. The relationship between Agelenopsis and Barronopsis, a genus once considered a sub-genus of Agelenopsis, was also examined. The two genera are reciprocally monophyletic but more generic level sampling is needed to confirm an apparent sister relationship between the two. [copyright] 2005 Elsevier Inc. All rights reserved.},
	keywords = {[Biochemical variation / / ] [North America / / Molecular phylogeny \&, Agelenopsis (Araneae)., Agelenopsis [Nucleic acids / mtDNA \& 16S rRNA sequences / Phylogenetic, Biochemistry, cytochrome, Evolution, Genetics, Land zones, Nearctic region, oxidase \& rRNA sequences] [Speciation / Speciation history / ], Proteins, relationships, sequences / ] [Molecular genetics / mtDNA, cytochrome oxidase \& rRNA, sequences / ] [Phylogeny / Molecular phylogeny / mtDNA, speciation implications] [Enzymes / Cytochrome oxidase I, speciation]., Systematics, Variation},
	isbn = {1055-7903},
	url = {<Go to ISI>://ZOOREC:ZOOR14110057613},
	author = {Ayoub, Nadia A. and Riechert, Susan E. and Small, Randall L.}
}
