Isometopus rugiceps Kerzhner, 1988

Fig. 7 F – H

Isometopus rugiceps Kerzhner, 1988 a: 789. Lectotype (as holotype, see Kerzhner 1988 b: 6): ♂, Russia: Vityaz’, 15 km south of Sukhanovka; ZISP .

Isometopus rugiceps: Kerzhner and Josifov 1999: 5 (catalogue, distribution), Schuh 2002–2013 (web catalogue), Ahn et al. 2018: 382 (diagnosis, photo), KSAE and ESK 2021: 155 (list), Taszakowski et al. 2023: 186 (catalogue).

Material examined.

South Korea – Gyeonggi-do. • 1 nymph (5 th); Jungang-dong, Gwacheon-si; 37°25.54'N, 126°59.28'E; 21. v. 2024; emerged as ♀ on 24. v. 2024; W. Kim leg. (SCNU) • 1 ♀, 5 nymphs (5 th); Manan-gu, Anyang-si; 37°25.96'N, 126°54.92'E; 24. v. 2024; W. Kim and J. Park leg. (SCNU) • 1 ♂; same locality; 25. v. 2024; J. Park leg. • 3 ♀♀; same locality; 30. v. 2024; W. Kim leg. (SCNU) . – Gangwon-do. • 1 ♀; Jindong-ri, Girin-myeon, Inje-gun; 576 m alt.; 13. vii. 2016; Oh, Lee, Choi, Ahn leg. (SNU) • 4 ♀♀; Anheung-myeon, Hoengseong-gun; 37°27.79'N, 128°08.44'E; 18. vi. 2023; W. Kim leg. (SCNU, UMMZ) . – Gyeongsangnam-do. • 8 ♀♀; Sicheon-myeon, Sancheong-gun; 35°14.06'N, 127°47.37'E; 13. vi. 2024; on light; W. Kim and S. Yang leg. (SCNU, UMMZ) .

Distribution.

Russia (Far East: Primorsky Krai) (Kerzhner 1988 b), South Korea (Gyeonggi-do, Gangwon-do, Gyeongsangnam-do, Jeollabuk-do) (Ahn et al. 2018).

Note.

This species is widely distributed in South Korea, where it inhabits the bark of multiple deciduous tree species (Table 3). Kerzhner (1988 b) briefly mentioned three nymphs that might pertain to this species collected from Ryazanovka, Primorsky Krai, on the bark of Quercus sp. ( Fagaceae) and Ulmus sp. ( Ulmaceae), but no additional information is available. We present images of the final-instar nymphs for the first time (Fig. 6 F); at first glance, it resembles I. hananoi Hasegawa, 1946 from temperate Japan in having a dark dorsum scattered with small, whitish spots (Tsunoda et al. 2020), but they can be distinguished by the spots being smaller and sparser, and the dark brown tergal segments with a medial bright region, its width approximately 1 / 4 of each abdominal segment.

Kerzhner (1988 b) reported individuals collected at light in two localities from Primorsky Krai. Similarly, we collected eight females at a light trap in Sancheong-gun, Gyeongsangnam-do Province. Additionally, a single male was collected at light in Mt. Maisan, Jeollabuk-do Province (WG Kim, pers. comm.).