期刊
JOURNAL OF ZOOLOGICAL SYSTEMATICS AND EVOLUTIONARY RESEARCH
卷 48, 期 4, 页码 285-293出版社
WILEY-HINDAWI
DOI: 10.1111/j.1439-0469.2010.00571.x
关键词
cryptic species; cytochrome oxidase I; DNA barcoding; Grania; internal transcribed spacer; intraspecific variation; phylogeny; species delimitation
资金
- Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (FORMAS)
- Swedish Taxonomy Initiative, Wilhelm and Martina Lundgren's Science Fund
- Helge Ax:son Johnson's Foundation
Individuals of five nominal species of Grania (Annelida: Clitellata: Enchytraeidae) were collected from locations in Sweden, Norway and France, for studies on the intraspecific variation at the Cytochrome Oxidase I (COI) locus of mitochondrial DNA and internal transcribed spacer (ITS) region of nuclear DNA. It was found that the previously described morphospecies in general contain low variation compared to the between-species variation in both loci. In one instance, however, an individual morphologically indistinguishable from G. ovitheca was found to be deviant and instead cluster with G. postclitellochaeta both by COI and ITS. We describe this individual as a new species: G. occulta sp.n. Furthermore, phylogenetic analyses were conducted, showing a close relationship between G. variochaeta, G. occulta, G. ovitheca and G. postclitellochaeta, as well as between G. pusilla and G. maricola. Using the results from the phylogenetic analyses, we discuss the evolution of morphological characters in Scandinavian species of Grania.
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