Plagiotrochus masudai Ide, Wachi & Abe sp. nov. (Hymenoptera: Cynipidae), a gall inducer on Quercus (Cyclohalanopsis) glauca Thunberg in Japan, is described. This is the first description of an oak gall wasp species (tribe Cynipini) inducing galls on Cyclohalanopsis. The unique life cycle of P. masudai takes 3 yr to complete. The adult wasps of the sexual generation emerge from bud galls on Q. glauca in spring of the first year, and those of the asexual generation emerge from twig galls in spring of the third year.
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1 November 2010
Discovery of a New Plagiotrochus Species (Hymenoptera: Cynipidae) Inducing Galls on the Evergreen Oak in Japan
Tatsuya Ide,
Nakatada Wachi,
Yoshihisa Abe
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Annals of the Entomological Society of America
Vol. 103 • No. 6
November 2010
Vol. 103 • No. 6
November 2010
alternation of generations
eastern Palearctic
new species
oak-gall wasp
ring-cupped oak