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The composition of the Dolichopodid fauna was studied at various sites within nymphaeid stands during one growth season in an oxbow lake with the aid of adhesive traps; additional observations were made by means of hand-net collecting at various localities within nymphaeid stands. The first...
Baetis nubecularis Eaton has been rediscovered at the type locality, in the Swiss Jura. The ♂ imago is redescribed, the ♀ imago, ♂ and ♀ subimagines and the nymphs are described for the first time. B. nubecularis is a member of the alpinus- group of Baetis and is compared to its other members,...
The types and additional specimens of Ephemeroptera which were studied by Longinos Navás and now deposited in the Museo de Zoologia del Ayuntamiento, Barcelona, are listed. For each of 97 species, full bibliographical references, collection localities, number of specimens, and type status are...
Comparative data are presented on nymphal growth and adult emergence for Nemoura avicularis, N. cinerea (Plecoptera), Siphlonurus aestivalis, S. lacustris and Leptophlebia vespertina (Ephemeroptera) from lake Myrkdalsvatn, western Norway. These species are all univoltine in Myrkdalsvatn....
A description of the hitherto unknown larva of Metanoea rhaetica Schmid 1955 is given. The most important diagnostic features are figured, and an attempt is made to include the larva in an existing key for larvae of Drusinae published by Szczesny (1978). Some taxonomic, zoogeographical and...
Protonemura helenae, a new species of the corsicana group from Southern Sicily is described, with notes on ecology and relationships with similar species. The origin, biogeography, taxonomy and phylogeny of this group of species are discussed.
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