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Based on Danish material genital characters are presented, permitting for the first time safe identification of the females of Lype phaeopa (Stephens) and L. reducta (Hagen). Life‐span of the adults of L. reducta is only a few days, the females emerge with fully matured eggs. In captivity...
Leuctra ariega sp. n. from the central eastern Pyrenees is described. Morphological features and habitat characteristics are provided and discussed in relation to similar species of the genus Leuctra.
The phylogeny of the Limnellia species is discussed and the division of the genus into two groups (quadrata and stenhammari) is proposed. A new species, Limnellia helmuti from Azores Islands is described.
Lappodiamesa multiseta sp.n., Arctodiamesa sp. from the Russian Far East and Arctodiamesa breviramosa sp.n. from the arctic region of East Siberia are described. These species differ from related species in characteristics of the male adult, the pupa and the larva. A key to the Holarctic species...
Ultrastructural studies carried out on the coupling system of the leptophlebiids, Habroleptoides confusa, Habrophlebia eldae and Choroterpes picteti identified the fine morphology of the external genital apparatus. In H. confusa and H. eldae penes consisted of two lobes, each presenting a...
A new species of aquatic bug, Idiotrephes meszarosi sp.n. (Helotrephidae, Helotrephinae, Limnotrephini) is described (male, female, nymphs) from Vietnam and compared with I. chinai Lundblad and I. maior Papáček. All species of the genus Idiotrephes are keyed and their differential characters...
Four new species of Lepidostoma Rambur 1842 are described: Lepidostoma ceratinon sp. n. from Cameroon, L. hamatum sp. n. from Tanzania, L. macroceron sp. n. and L. wliense sp. n. from Ghana.
By making regular, exhaustive, exuvial collections throughout the emergence period, the seasonal pattern of emergence was characterized for five species of Odonata in a permanent stream in southern Spain. Although emergence started at different times from mid‐April to late August, it was...
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