Macrocera abdominalis Okada 1937

Figs. 5–6, 9a

Material examined. One male (SNUE), Yongdae Recreational Forest, Inje-gun, Gangwon-do, South Korea (38°14'33.0"N, 128°20'11.3"E; Fig. 1), dry pinned, terminalia cleared and mounted on slide. Collected during May 16 to June 22, 2023, by Woo Jun Bang, Sangjin Han, and Jonghwan Choi using Malaise trap . One female (SNUE), Odaesan Mountain, Pyeongchang-gun, Gangwon-do, South Korea (37°47'24.0"N, 128°33'52.7"E; Fig. 1). Collected during July 12 to August 4, 2022, by Woo Jun Bang, Sangjin Han, and Jonghwan Choi using Malaise trap .

Comments. Preservation quality of the specimens was not very good, but following characters made the identification possible: spotted patterns on the abdomen of male both on the dorsal (Fig. 5a) and ventral (Fig. 5b) sides, uniformly reddish-yellow colored mesonotum (Fig. 9a), antennae very long in male being almost three times the body length (Fig. 5a), and a wing pattern (Fig. 6a) matching that of the figures by Okada (1937, 1939b). Abdominal spots are much thickened in the female, forming almost a striped pattern, which also matches the Okada’s (1937) description (Fig. 5c). This species is somewhat similar to M. interrupta including the structure of male terminalia, which have been figured for the first time in the current study (Figs. 6b–d). However, some distinctive features can separate these two species as mentioned for M. interrupta, which is also supported by our NJ tree analysis (Fig. 10). This species was only known from Japan (Okada 1937, 1938a 1938b, 1939a, 1939b, Sasakawa 2005) and Far East Russia (Southern Kuril Islands; Okada 1937) so far.

DNA Sequences. Partial COI gene of both specimens sequenced: female (Accession: PV300948) and male (Accession: PV300949).