Agelenids of the World

Systematics and Taxonomy of Agelenidae, a Worldwide distributed Spider Family

Speciation history of the North American funnel web spiders, Agelenopsis (Araneae: Agelenidae): phylogenetic inferences at the population-species interface

Publication Type:Journal Article
Year of Publication:2005
Authors:N. A. Ayoub, Riechert, S. E., Small, R. L.
Journal:Molecular Phylogenetics and Evolution
Date Published:2005
ISBN Number:1055-7903
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

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.

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