T R Nielsen

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DNA sequences offer powerful tools for describing the members and interactions of natural communities. In this study, we establish the to-date most comprehensive library of DNA barcodes for a terrestrial site, including all known macroscopic animals and vascular plants of an intensively studied area of the High Arctic, the Zackenberg Valley in Northeast(More)
Eristalis obscura Loew, 1866, is Holarctic in distribution and E. pseudorupium Kanervo, 1938 and£. beltrami Telford, 1970 are junior synonyms of it. E. obscura shows a great morphological variation of the superior lobe in the male genitalia, which is documented by illustrations. The distinguishing characters of E. obscura and other similar species are(More)
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