oa Annals of the Natal Museum - A revision of the Xestomyza-group of Therevidae (Diptera)

Volume 21, Issue 2
  • ISSN : 0304-0798



The paper presents a revision of a group of Therevidae formed by eight African genera and one New World genus. The group is motivated as a monophyletic unit, especially on the basis of a study of the female and male terminalia. The nine genera and a total of 28 species, of which 20 are new to science, are descriptionbed and figured. Keys are presented. The descriptionptions are supplemented by series of measurements. The male terminalia of nearly all species are illustrated. Some remarks are given on the phylogenetic relationships within the group and within the family Therevidae. Five of the eight African genera are descriptionbed as new to science. Three of them, Delphacura gen.nov., Cochlodactyla gen. nov. and Ceratosathe gen. nov. are monobasic and descriptionbed on the basis of new species. Microgephyra gen.nov., with seven new species in it, is descriptionbed. Hemigephyra gen. nov. includes two species, one of which is descriptionbed as new. Braunsophila Kröber, 1931, and Xestomyza Wiedemann, 1820, are two other monobasic African genera. Pseudoxestomyza longirostris Kröber, 1912, is placed as a new synonym of Xestomyza lugubris Wiedemann, 1820. The last African genus, Pentheria Kröber, 1914, includes eight species, four of which are descriptionbed as new. Two of the species, Psilocephala rufipes Bigot, 1889, and Ectinorhynchus alternans Loew, 1857, are placed in combination with Pentheria Kröb. for the first time. Psilocephala xylophagoides Enderlein, 1912, is a new synonym of Pentheria rufipes (Bigot, 1889). Pentheria ponti is a new name for P. rufipes Kröber, 1933 (nec Bigot, 1889). Ectinorhynchus braunsi Kröber, 1931, is placed in new combination with Hemigephyra gen. nov. The New World genus Henicomyia Coq. includes six species, five of which are descriptionbed as new to science. The African genera are restricted to southern Africa, only two species of Pentheria reach northwards to Rhodesia and Tanzania. Henicomyia occurs in Brazil, Peru, Costa Rica, Mexico and Arizona.

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