Taxonomic revision identifies a new species and key records in Hymenoptera populations in Japan, indicating diverse fauna.
The Japanese species of the genus Synacra Förster are taxonomically revised. In total six species are recognized. Synacra foveata sp . n . is described as new to science based on specimens from Kyushû. The association of the male and female of the new species was confirmed based on the mitochondrial gene cytochrome c oxidase submit I ( COI ). Three species are newly recorded for Japan: S . atracta Macek, 1995, S . brachialis (Nees, 1834), S . compressigastra Chemyreva & Kolyada, 2020. A new host record for S . paupera is provided for Japan. A taxonomic key to 13 species of Synacra occurring in the Palaearctic region is presented.
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