North American Speyeriabutterflies are a group whose species hypotheses are confounded by shared wing color patterns between sympatric populations of closely related recognized species due to a putatively recent origin in evolutionary time. Previous studies of this group and the closely related Palearctic genus Argynnis, suggest that Speyeriais monophyletic but derived from within Argynnis . Sampling in these studies has either involved few basal Speyeria species, or too few Argynnis species (Simonsen 2006, Simonsen et al. 2006). Thus, no comprehensive phylogenetic analysis exists for all members that answers the question of monophyly of Speyeria, or other subgeneric taxa,and their relationship to Argynnisspecies. A phylogenetic analysis was completed of all North American Speyeriaspecies and nearly all species within Argynnis, using one mitochondrial (CO1) and four nuclear genes (EF1?, WG, GAPDH, and RPS5). The results indicate that North American Speyeria is a monophyletic group, but that Palearctic Argynnis is paraphyletic. Three major lineages are identified within Argynnis sensu lato: two Palearctic and one containing both Palearctic and Nearctic species. Argynnis species representing the subgenera Argyreus, Argyronome, Childrena, Damora,Pandoriana, and Nephargynnis, belong to a well-supported lineage that split early in the evolution of the group and is comprised of species with long branches. Fabricianaand Mesoacidalia were both recovered as strongly supported lineages, except for A. clara which was recovered as sister to Speyeria. In summary, the phylogenetic analyses suggest the need for reorganization into three genera: Argynnis, Fabriciana, and Speyeria. The results have implications for the conservation of these butterflies across the temperate zone by providing a framework for understanding potential gene flow between sympatric species complexes, proper taxonomic validity, and the natural history of threatened populations of Speyeriaand Argynnisbutterflies.
|Commitee:||Brunell, Mark, Gridi-Papp, Marcos|
|School:||University of the Pacific|
|School Location:||United States -- California|
|Source:||MAI 55/04M(E), Masters Abstracts International|
|Subjects:||Entomology, Evolution and Development, Systematic|
|Keywords:||Argynnini, Argynnis, Fabriciana, Phylogenetics, Speyeria, Viola|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be