Onycholyda viriditibialis ( Takeuchi, 1930 )

Bourke, Joanna, 2024, Taxonomic Notes and New Distribution and Host Plant Records for Sawflies and Woodwasps (Hymenoptera, Symphyta) of Japan IX, Bulletin of the National Museum of Nature and Science. Series A, Zoology 50 (1), pp. 19-32 : 24

Onycholyda viriditibialis ( Takeuchi, 1930)

Japanese name: Aosune-hirata-habachi

( Fig. 2A–C )

Host plant. Rosaceae : R. crataegifolius ( Okutani and Fujita, 1956; Shinohara and Kojima, 2009), R. microphyllus L.f. ( Hara and Shinohara, 2017). R. peltatus (new record; see Remarks below).

Remarks. Bionomics of this species was studied by Okutani and Fujita (1956), Shinohara and Kojima (2009) and Hara and Shinohara (2017). On September 2, 2023, Shinohara found one larval leaf-roll of this species on a leaf of R. peltatus ( Fig. 2A, B ) in Kagamiganaru, Tottori Prefecture. The leaf-roll was loose and contained one late-instar larva and frass ( Fig. 2C ). The larva had the head entirely black and the prothoracic shields and both the dorsal and ventral sides of the terminal abdominal segment marked with black ( Fig. 2C ). This color pattern is characteristic of O. viriditibialis ( Okutani and Fujita, 1956; Shinohara and Kojima, 2009). Rubus peltatus is the first host plant record for the sawfly.

Figures

Fig. 2.ɹOnycholyda viriditibialis (A–C) and O. esakii (D, E), photographed in Kagamiganaru by A. Shinohara on September 2, 2023. — A, Larval abode (arrowed), upper surface; B, same abode (arrowed), under surface; C, late-instar larva in abode with frass; D, two larval abodes (arrowed), under surface; E, close-up of larval abodes.