Psylliodes punctifrons Baly, 1874

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

Psylliodes punctifrons Baly, 1874

Fig. 7 A – P

Host plant.

Brassicaceae : Brassica juncea (L.) , Raphanus sativus L. var. raphanistroides (Makino), Rorippa palustris (L.) , Eutrema japonicum (Miq.) . Cardamine anemonoides , Brassica chinensis and B. napus are also recorded as host plants ( Takizawa 2005).

Leaf mine.

Full-depth linear mine occurs on leaf blade, midrib, petiole, and shoot (Fig. 7 C – E, H, I, L – P ). The egg is laid on the leaf, and the hatched larva mines toward midrib, and reenters leaf blade. Larvae alternates mining the leaf and mining the midrib / petiole / shoot, and often relocates its mine. Frass is deposited compactly in a few parts of the mine, and sometimes discharged from the mine through the perforated holes. The fully grown larva exits the mined leaf, falls to the ground, pupates underground. Adult emerges ~ 1 month after pupation. On Eutrema japonicum with long petiole, linear mine of petiole and midrib of mature leaf (Fig. 7 L – P ). The mined petiole turns blackish. Frass is deposited compactly in a few parts of the mine, and sometimes discharged from the mine through perforated holes.

Material examined.

• 23 adults, Kusauchi , Kizu-gawa, Kyôtanabe, Kyoto Pref. 11-III-2020 (as larva on Brassica juncea ), emerged on 1–15-V-2020 (Fig. 7 A – E ) ; • 1 adult, Kôda , Notojima Is., Nanao, Ishikawa Pref., 2-V-2023 (as larva on Raphanus sativus var. raphanistroides ), emerged on 4-VI-2023 (Fig. 7 G – J ) ; • 2 adults, Watarase , Fujioka, Tochigi Pref., 25-V-2020 (as larva on Rorippa palustris ), emerged on 8–14-VI-2020 ; • 19 adults, Futamata , Oshamanbe, Hokkaidô, 20-V-2023 (as larva on Eutrema japonicum ), emerged on 14–25-VI-2023 (Fig. 7 K – M ) ; • 2 adults, Nyû-kawa , Takayama, Gifu Pref., 1-V-2023 (as larva on Eutrema japonicum ), emerged on 29-V – 5-VI-2023 (Fig. 7 N – P ) .

Figures

Figure 7. Habitus of adults and larvae, habitat, and leaf mines of three Psylliodes species A – J P. punctifrons K – P P. sasakii Q – T P. subrugosa. Host plants A – F Brassica juncea at Kizu-gawa, Kyôto G – I Raphanus sativus var. hortensis at Notojima Is., Ishikawa Pref. K – M Eutrema japonicum at Futamata, Oshamanbe, Hokkaido N – P Eutrema japonicum at Nyûkawa, Takayama, Gifu Pref. Q – T Arabis hirsuta at Shimo-suwa, Nagano Pref.