title: First record of the genus Pion Schiødte, 1839 (Hymenoptera: Ichneumonidae: Ctenopelmatinae), from Japan, with description of a new species.
abstract: The genus Pion Schiødte, 1839, is newly recorded from Japan based on a new species, P. japonicum sp. nov. This species closely resembles the Chinese species P. qinyuanensis Chen, Sheng & Mao, 1998, but it can be distinguished from the following combination of character states (male of P. qinyuanensis is unknown): lateromedian longitudinal carina of propodeum completely parallel, not convergent anteriorly (almost parallel but slightly convergent anteriorly in P. qinyuanensis); malar space 0.6 times as long as basal width of mandible (0.5 times in P. qinyuanensis); antenna with 28-29 flagellomeres (30-34 in P. qinyuanensis); hind femur black, rarely tinged with red (largely red in P. qinyuanensis); and hind tibia yellowish-brown basally, black apically (entirely black in P. qinyuanensis). A key to world species of Pion is also provided.
authors.affiliation: Kanagawa Prefectural Museum of Natural History, Iriuda 499, Odawara, Kanagawa 250-0031, Japan.; Email: watanabe-k@nh.kanagawa-museum.jp.
authors.forename: Kyohei
authors.initials: K
authors.lastname: Watanabe
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D005260:Female; D007564:Japan; D008297:Male; D009929:Organ Size; D014863:Wasps / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development