Pachyerannis obliquaria (Motschulsky, 1861)

Beljaev, Evgeniy A., Vasilenko, Sergey V., Dubatolov, Vladimir V. & Zinchenko, Vadim K., 2024, First report on late autumn geometer moths (Lepidoptera: Geometridae) from Kunashir Island, Russia (Southern Kurils), Amurian Zoological Journal XVI (4), pp. 979-995 : 985

* Pachyerannis obliquaria (Motschulsky, 1861)

Material. Kaldernyi Cordon, in the daytime: 30.10.2023 – 3♂, 31.10.2023 – 7♂, 1.11.2023 – 3♂ (Dubatolov, Zinchenko); ibid., at light, 30 – 31.10.2023 – 2♂, 31.10– 1.11.2023 – 1♂; Andreevskii Cordon, at light: 1– 2.11.2023 – 1♂, 3– 4.11.2023 – 3♂, 4– 5.11.2023 – 2♂, 5– 6.11.2023 – 2♂, 6– 7.11.2023 – 1♂ + VO, 7– 8.11.2023 – 1♂; ibid., plateau, mixed forest, in the daytime , 18.11.2023 (Zinchenko) – 1♂.

Distribution. Russia (S RFE: S Amur Obl., Jewish A.O., S Khabarovsk Kr., Primorsky Kr., SW Sakhalin, S Kurils – Kunashir); Japan (Hokkaido, Honshu, Shikoku, Kyushu), North Korea, South Korea.

Remarks. The flight period of moths of P. obliquaria on Kunashir was observed from late October to mid-November, while on Sakhalin they were noted earlier, in the last ten days of October ( Beljaev, Titova 2023). In Japan, the moths appear from late October to late December, depending on the region, and the species is usually numerous in various habitats ( Sato 2011). In the continental part of the RFE, the moths are observed throughout October ( Beljaev 1996). The larvae feed on various leaved woody plants, with a preference for species of Quercus ( Fagaceae ).