Abstract
AbstractThe taxonomy and identification of mayflies of theBaetis vernusgroup (Ephemeroptera: Baetidae) represents a major challenge in both Europe and North America. The recent description ofB. jaerviiSavolainen from Finland, a species taxonomically close to the Palaearctic taxonBaetis macaniKimmins and the NearcticB. bundyaeLehmkuhl, called for clarification of the status and distribution of these species in northernmost Europe. We generated mtDNA COI sequences for establishing the identity of the collected samples. Based on these data we conclude thatB. bundyaedoes occur in northeastern Finland in sympatry withB. macani. Accordingly, this taxon shows a highly interesting distributional pattern across the Nearctic and western Palaearctic regions.
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