Myiomma ussuriense Ostapenko, 2001

Fig. 8 A – F

Myiomma ussuriensis: Ostapenko, 2001: 358. Holotype: ♀, Russia: 30 km NW of Arsen’ev, Primorsk Terr.; originally in Ostapenko’s collection, now deposited at ZISP .

Myiomma ussuriensis: Schuh, 2002 –2013 (web catalogue), Taszakowski et al. (2023): 190 (catalogue).

Myiomma ussuriense: Kment and Carapezza 2017: 566 (list).

Myiomma koreana: Oh et al. 2025: 147. Holotype: ♂, Korea: Mt. Gaya, Seongju-gun; SNU . syn. nov.

Myiomma kukai: Jung and Lee 2012: 53 (misidentification), see Oh et al. 2025: 152.

Type material examined.

Myiomma ussuriense Ostapenko, 2001 . Holotype: ♀, “ [Primorsky krai, 30 km \ NW of Arsen’ev \ on Fraxinus mandshurica \ K. Ostapenko, 4. 8. 1999] ” [handwritten] “ Holotypus \ Myiomma \ ussuriensis \ Ostapenko det. 2000 ” [printed + handwritten] also with ZISP catalogue number: INS _ HEM _ 0000126; deposited in ZISP. Myiomma koreanum Oh & Lee, 2025 . Holotype: ♂, “ SNU \ Coll. #: 220806 MS- 001 \ Loc.: Mt. Gaya, \ Seongju-gun, GB, Korea \ from light trap \ Date: 06. viii. 2022 \ Leg.: WG. Kim ” [printed] “ HOLOTYPE \ Myiomma koreana \ Oh & Lee, 2025 ” [printed]; deposited in SNU.

Note.

Oh et al. (2025) described M. koreana based on eight specimens collected from four localities in South Korea, provided a description of both sexes, and briefly documented its bionomics. However, according to Kment and Carapezza (2017) the correct gender of Myiomma is neuter, and this species name should be amended as M. koreanum (ICZN 1999, article 31.2.). In describing M. koreanum, the authors were aware of M. ussuriense, which has been described based on a single female from Primorsky Krai, Russia, but have regarded the Korean specimens as distinct, mostly following Ostapenko’s (2001) original description of M. ussuriense .

Type specimens of M. koreanum collected from Korea showed differences with Ostapenko’s (2001) descriptions and figures, mainly following color and structures (original text of Ostapenko 2001: 358 in square brackets): 1) Structure of postocular rim viewed from the lateral side, 2) Inner margin of compound eye not conjoined [Eyes large, contacting along midline of head], 3) Blackish brown metafemur [hind femora pale brown, with diffuse subapical ring and apex yellow], 4) Dorsum densely covered with brown setae [covered dorsally with sparse recumbent hairs], 5) Clavus and corium uniformly dark brown [Inner margin of clavus and base of corium yellowish brown], 6) Metatibia widely dark brown, apical 1 / 4 pale [hind tibiae dark brown with yellowish apical half].

Photographic examination of the holotype of M. ussuriense housed at ZISP (Fig. 8 A – E) showed that Ostapenko’s (2001) description is misleading, as it is different from the actual conditions found in the holotype. All morphological features of the female specimens of M. koreanum collected from Korea match well with the holotype of M. ussuriense, and we confirm that Myiomma koreanum Oh & Lee, 2025 is a new subjective synonym of Myiomma ussuriense Ostapenko, 2001 .

Therefore, COI sequences previously submitted to GenBank, PQ 530509, PQ 530510 (Oh et al. 2025, as M. koreana) and GU 194800 (Jung and Lee 2012, as M. kukai . See Oh et al. 2025: 151, 152) should be referred to as M. ussuriense . Kerzhner (1988 b) mentioned a nymph of an undescribed Myiomma collected from Ryazanovka, Primorsky Krai, on the bark of Quercus dentata, but this species was never formally described, and could possibly pertain to M. ussuriense, based on the distribution of known Myiomma species from the Far East (Fig. 8 F).