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Morphological and molecular species delimitation within the Holarctic Ilybius angustior complex with a focus on Beringia (Coleoptera: Dytiscidae)
Umeå University, Faculty of Science and Technology, Ecology and Environmental Science.
2007 (English)In: Aquatic Insects, ISSN 0165-0424, Vol. 29, no 3, 159-171 p.Article in journal (Refereed) Published
Abstract [en]

A fourth species of the Holarctic Ilybius angustior complex, Ilybius minakawai n. sp., is described from the Island of Sakhalin in the Russian far east. Male genitalia are diagnostic within this species complex, although from body size and shape the new species cannot be separated from I. churchillensis Wallis from north Alaska and the Canadian low arctic. The small and narrow body characteristic of these two species represents an extreme of the cold climate form of the widespread I. angustior (Gyllenhal). Low variation within the studied large ribosomal and cytochrome c oxidase subunit I mitochondrial genes suggest that speciation events within the I. angustior-complex are fairly recent. In combination with known geographical ranges, the low genetic variation within this species complex suggest speciation within Pleistocene refugia including Beringia.

Place, publisher, year, edition, pages
2007. Vol. 29, no 3, 159-171 p.
URN: urn:nbn:se:umu:diva-20277DOI: 10.1080/01650420701383136OAI: diva2:208356
Available from: 2009-03-17 Created: 2009-03-17

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