Skip to main content
ARS Home » Northeast Area » Beltsville, Maryland (BARC) » Beltsville Agricultural Research Center » Systematic Entomology Laboratory » Research » Publications at this Location » Publication #381892
Research Project: Systematics of Plant-Feeding Flies of Importance in Agroecosystems and the Environment

Location: Systematic Entomology Laboratory

Title: Japanese conifer sawflies of the Gilpinia hakonensis subgroup of the G. socia group (Hymenoptera, Diprionidae): G. okinawa sp. nov. and ovipositors of five European species

Author
item HARA, H - Hokkaido Research Organization
item Smith, David
item SHINOHARA, AKIHIKO - National Museum Of Nature And Science

Submitted to: Zootaxa
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/23/2021
Publication Date: 7/1/2021
Citation: Hara, H., Smith, D.R., Shinohara, A. 2021. Japanese conifer sawflies of the Gilpinia hakonensis subgroup of the G. socia group (Hymenoptera, Diprionidae): G. okinawa sp. nov. and ovipositors of five European species. Zootaxa. 4995(3):471-497. https://doi.org/10.11646/zootaxa.4995.3.4.
DOI: https://doi.org/10.11646/zootaxa.4995.3.4

Interpretive Summary: The caterpillar-like larvae of sawflies are all plant feeders. Many can be economically important in agricultural crops, forests, and ornamentals. Species of one worldwide group feed on pines and other conifers, and some cause extensive damage and outbreaks in forests. Several species are accidentally introduced into North America and have caused widespread damage to pine and spruce forests. This conifer-feeding group is not well known in Japan and eastern Asia. One subgroup of three species, including one new species, is reviewed. Species are described and illustrated and separated from related species. Five species from Europe are also illustrated for comparison. This will be of interest to scientists interested in plant-feeding insects and will be helpful to identifiers of intercepted specimens from eastern Asia.

Technical Abstract: The Gilpinia hakonensis subgroup of the G. socia group is proposed for three closely similar species, G. hakonensis (Matsumura, 1912) from Honshu and Kyushu, Japan and Korea, G. amamiana Okutani, 1965, from Amami Oshima Island and Tokunoshima Island, Japan and G. okinawa sp. nov. from Okinawa Island, Japan. Descriptions or redescriptions are given for the three species with figures of the ovipositors and male genitalia. A lectotype for Lophyrus hakonensis Matsumura, 1912 is designated. The males of G. hakonensis and G. amamiana are first described. Gilpinia fukudai (Togashi, 1964) from Honshu, Japan, is a new synonym of G. hakonensis. The host plant of G. hakonensis is Pinus densiflora Siebold et Zucc. Gilpinia amamiana is newly recorded from Tokunoshima Island. For comparison, ovipositors of five European species of the G. socia group, G. abieticola (Dalla Torre, 1894), G. frutetorum (Fabricius, 1793), G. laricis (Jurine, 1807), G. socia (Klug, 1812) and G. variegata (Hartig, 1834), are described and figured. The ovipositors of G. frutetorum, G. laricis and G. variegata are figured for the first time. Gilpinia laricis is newly recorded from Bulgaria.