Open AccessDistribution and phenology of the <i>Ancistrocerus</i> and <i>Symmorphus</i> species in eastern Fennoscandia (Hymenoptera, Eumenidae)¹
Author(s) -
A. Pekkarinen,
Larry Huldén
Publication year - 1991
Publication title -
entomologica fennica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.173
H-Index - 21
eISSN - 2489-4966
pISSN - 0785-8760
DOI - 10.33338/ef.83547
Subject(s) - phenology , voltinism , deciduous , hymenoptera , distribution (mathematics) , range (aeronautics) , forestry , ecology , geography , biology , larva , mathematics , mathematical analysis , materials science , composite material
Distribution and phenology of ten Ancistrocerus and eight Symmorphus species in Finland and the northwestern U.S.S.R. are presented on the basis of 8495 specimens from public and private collections. A. nigricornis, S. fuscipes and S. murarius are shown to have retreated during the last few decades from a large area of their former range in Finland. The proportions of A. antilope, A. parietum, S. allobrogus and S. crassicornis have decreased, while the proportion of A. parietinus has considerably increased in the area after the year 1970. Decrease of dead deciduous trees is one possible reason. A. parietum and A. trifasciatus are possibly bivoltine in southern Finland.