Taxonomy and evolution of putative thelytokous species of Leptopilina (Hymenoptera: Figitidae) from Japan, with description of two new species

摘要

Wasps of the genus Leptopilina (Hymenoptera: Figitidae) are larvo-pupal parasitoids of Drosophila species. Here we report three putative thelytokous species of this genus from Japan, with description of two new species L.tokioensis and L.tsushimaensis, which have been recorded from central Japan and Tsushima, respectively. Another thelytokous species is L.longipes occurring in northern Japan, although its European populations are assumed to be arrhenotokous. Preliminary phylogenetic analyses suggest the present three species are diversified from one another and also from the other Leptopilina species. These three thelytokous species are infected by B-supergroup Wolbachia as in European thelytokous species, L.clavipes and L.australis. The evolution of these thelytokous species is discussed based on the present and previous results, and the occurrence and distributions of Leptopilina species in Japan and surrounding regions are briefly reviewed.