Two New Palaearctic Genera of the Ichneumon Wasp Tribe Mesoleiini (Hymenoptera, Ichneumonidae: Ctenopelmatinae) with Pectinate Tarsal Claws

摘要

Abstract Two new Palaearctic genera, Mesolonyxgen. n. and Tashantagen. n. are described in the tribe Mesoleiini (Ichneumonidae: Ctenopelmatinae). The new taxa are related to the genera Mesoleius Holmgren, 1855, Neostroblia Heinrich, 1953, and Rhinotorus Foerster, 1869 but may easily be distinguished from them and from other genera of the tribe by distinctly pectinate tarsal claws. The species of Tashanta differ from the genus Mesolonyx mainly in having basal flagellomere shorter and tergites 1–3 with a superficial transverse postmedian groove, which within the tribe Mesoleiini is still characteristic only of Rhinotorus. The genus Mesolonyxgen. n. includes one trans-Palaearctic species M. ruficoxasp. n., in which, in addition to the typical form from Europe and Israel, four varieties are described from different parts of the range—var. anatolica from southeastern Turkey, var. armeniaca from Armenia, var. atbasar from central Northern Kazakhstan, and var. baicalica from Irkutsk Province, Russia: East Siberia. In the genus Tashantagen. n. five species are described: T. altaicussp. n.,T. gracilissp. n.,T. nemoralissp. n.,T. sibiricussp. n., and T. tianshanicussp. n. Keys to the varieties of Mesolonyxruficoxa and Tashanta species are given.