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GEOGRAPHICAL VARIATION OF CERTAIN TAXONOMIC CHARACTERS IN NATURAL POPULATIONS OF TANYTARSUS HEUSDENSIS (DIPTERA: CHIRONOMIDAE) IN FINLAND

Published online by Cambridge University Press:  31 May 2012

Tellervo Rosenberg
Tellervo Rosenberg
Affiliation:
Department of Zoology, University of Helsinki, Helsinki, Finland
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Abstract

The variation in several morphological characters of adults and pupal exuviae of Tanytarsus heusdensis Goetgh. sensu auctorum (Tanytarsus usmaënsis Pagast according to Reiss, pers. comm.) in populations from some lakes and from brackish water in Finland was studied in order to check the homogeneity of the material. Significant differences were found in LRI, wing length, AR, and LRIII of males. In pupal exuviae the number of hairs on the anal lobes shows considerable variation in both sexes, and the average length of the spine comb on dorsal tergites III–VI differs in different populations. Nevertheless, from mathematical analysis of the data it is concluded that the differences observed do not indicate the existence of more than one species in the material studied.

Type
Articles
Information
The Canadian Entomologist , Volume 103 , Issue 3 , March 1971 , pp. 432 - 444
Copyright
Copyright © Entomological Society of Canada 1971

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