Masaakia longivaginata Takeuchi, 1950

Fu, Yuanzun, Yuan, Yuan, Shen, Qian, Xu, Hao, Ye, Zheng, Guo, Li, Wu, Xiaoliang & Zhao, Yunhe, 2021, Taxonomic Notes and New Distribution and Host Plant Records for Sawflies and Woodwasps (Hymenoptera, Symphyta) of Japan VI, Bulletin of the National Museum of Nature and Science. Series A, Zoology 47 (4), pp. 163-188 : 180

Masaakia longivaginata Takeuchi, 1950

Japanese name: Hime-yashabushi-habachi

( Fig. 8A )

Material examined. HONSHU: Tochigi Pref.: 1 ˁ, Nakagawa, Yamata , 36°42′N 140°12′E, coll. larva ( Fig. 8A ), on Alnus hirsuta var. hirsuta , 16. V. 2019, em. 9. IV. 2020, S. Ibuki .

Larva. Late instar larva ( Fig. 8A ) pale green; trunk with semitransparent branched spines; thoracic spines apically brownish. Mature larva 12 mm long; head pale greenish yellow; trunk pale green, without spines; legs pale yellow green, with claws brownish.

Host plants. Betulaceae : Alnus hirsuta (Spach) Turcz. ex Rupr. var. hirsuta (new record), A. pendula Matsum. ( Togashi, 1979).

Life history. The sawfly has one generation a year. The larva is solitary and has an extra larval molt. The final instar larva makes a cocoon in the soil. Hibernation is done in the cocoon.

Remarks. The larva has not been described so far. The known host plants are only Alnus .

Figures

Fig. 8. A–C, Late instar larvae: A, Masaakia longivaginata, 21. V. 2019; B, Monophadnoides montanus, 18. VI. 2019; C, Strongylogaster moiwana, 30. V. 2017.All photographed by Ibuki.