Phyllotreta ezoensis Kimoto, 1993

Kato, Makoto & Imada, Yume, 2025, Diversity and host plant utilization of leaf-mining beetles of Chrysomeloidea (Coleoptera) in Japan, ZooKeys 1238, pp. 209-268 : 209-268

Phyllotreta ezoensis Kimoto, 1993

Fig. 3 A – I

Host plant.

Brassicaceae : Draba nemorosa L. The host plant grows on levee of traditional rice fields and upland fields in Central Honshu (Fig. 3 C ).

Leaf mine.

Full-depth linear mine of leaf blade, midrib, petiole, and shoot (Fig. 3 D – I ). The egg is laid on the leaf, and the hatched larva mines toward the midrib, and reenters midrib / leaf blade. Larvae repeats mining leaf and mining midrib, petiole, and / or shoot, often by exiting its mine and establishing a new mine. Frass is granular, deposited linearly along midline of the mine. The fully grown larva exits the mined leaf, falls to the ground, and pupates underground. The adult emerges ~ 2 weeks after pupation, and varies in elytral pattern (Fig. 3 A, B ).

Material examined.

• 6 adults, Matsubara-Lake , Koumi, Nagano Pref. 21-V-2021 (as larva on Draba nemorosa ), emerged on 4-VI-2021 (Fig. 3 A – E ) ; • 15 adults, Kiyosato , Hokuto, Yamanashi Pref., 4-V-2022 (as larva on D. nemorosa ), emerged on 17–20-V-2022 (Fig. 3 F – I ) .

Figures

Figure 3. Habitus of adults and leaf mines of two Phyllotreta species A – I P. ezoensis J – M P. shirahatai. Host plants A – I Draba nemorosa at Kiyosato, Yamanashi Pref. J – M Cardamine appendiculata at Eniwa (J, K) and Tobai (L, M), Hokkaido.