Revision of the Scandinavian species of Xorides Latreille, 1809 (Hymenoptera: Ichneumonidae: Xoridinae), with an illustrated key to the species of Northern Europe

Abstract

The Scandinavian species of Xorides Latereille, 1809 are revised and the study recognizes 13 species occurring in Sweden and 11 in Norway. One species, Xorides hilszczanskii Johansson sp. nov., a parasitoid of the cerambycid Saperda perforata (Pallas, 1773) is described as new to science. The following taxonomic updates are proposed: Xorides hedwigi Clément, 1938 syn. nov. of Xorides sapporensis (Uchida, 1928); Xorides niger (Pfeffer, 1913) syn. nov. of Xorides fuligator (Thunberg, 1824); Xorides minutus (Clément, 1938) syn. nov. of Xorides praecatorius (Fabricius, 1793); Xorides berlandi (Clément, 1938) syn. nov., Xorides asiasius Sheng & Hilszczański 2009 syn. nov. and Xorides cinnabarinus Sheng & Hilszczański 2009 syn. nov. of Xorides indicatorius (Latreille, 1806). Xorides sordator (Thunberg, 1824) stat. rev. is the valid name for the species previously treated under the name Xorides fuligator. Barcodes for 12 species have been obtained and are stored in BOLD. An illustrated key to the 17 species occurring in Northern Europe and adjacent regions is provided. All Xorides species are parasitizing xylophagous Coleoptera, primarily Cerambycidae and Buprestidae and a short discussion is given on their potential role as indicators of sustainable forestry and biodiversity in boreal forest ecosystems.