On the basis of the results of an analysis primarily of the morphology of the male palps and palpal organs the delimitation of the erigonine genera Pelecopsis Simon and Trichopterna Kulczyński and the phylogenetic relationships between European and East African species of these genera are discussed. For the East African species Pelecopsis convexa (Holm), and P. bacelarae (di Caporiacco), together with two undescribed species from Nigeria, the new genus Locketia is established. Pelecopsis humiliceps sp.n. and P. albifrons sp.n., both from Kenya, are described and P. tenera (Holm, 1962), preocc. P. tenera (Schenkel, 1927), is replaced by P. tenuipalpis nom.n. Viewpoints are presented on evolutionary trends and phylogeny of European and East African Pelecopsis species.
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Å. Holm (1979) studied this question.
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