Sigynia ernobii Hedqvist, 1974

Tselikh, Ekaterina V., Kosheleva, Oksana V., Ku, Deok-Seo, Lee, Jaehyeon & Belokobylskij, Sergey A., 2025, The hymenopteran parasitoid complex (Hymenoptera, Braconidae, Eulophidae, Pteromalidae) of the pine bark beetle Cryphalus fulvus Niisima, 1908 (Curculionidae, Scolytinae) in South Korea, Journal of Hymenoptera Research 98, pp. 637-652 : 637-652

Sigynia ernobii Hedqvist, 1974

Figs 32–39

Sigynia ernobii Hedqvist, 1974: 53. Holotype female ( NHRS, examined).

Redescription.

Female. Body length 2.00– 2.50 mm; fore wing length 1.40–1.90 mm.

Coloration. Head and mesosoma black with metallic diffuse blue and coppery lustre; clypeus black with metallic diffuse green and coppery lustre; antenna with scape brown, pedicel, anelli, F 1 – F 6 and clava dark brown. All coxae black; all femora and tibiae brown, all tarsi yellowish brown. Fore wing hyaline, venation brown. Metasoma dorsally dark brown with metallic coppery lustre; ovipositor sheaths brown.

Sculpture. Head, clypeus, mesosoma and propodeum reticulate; petiole smooth; metasoma smooth and shiny.

Head. Head in dorsal view 2.14–2.17 × as broad as long and 1.18–1.27 × as broad as mesoscutum; in frontal view 1.32–1.38 × as broad as high. POL 2.40–2.46 × as long as OOL. Eye height 1.17–1.29 × eye length and 1.89–2.09 × as long as malar space. Distance between antennal toruli and lower margin of clypeus 0.6–0.64 × distance between antennal toruli and median ocellus. Antenna with scape 0.77–0.79 × as long as eye height and 0.93–1 × as long as eye length; pedicel 1.9–2 × as long as broad; combined length of pedicel and flagellum 0.77–0.79 × breadth of head; F 1 – F 6 transverse, F 1 0.8–0.85 × as long as broad and with 1 rows of sensilla; clava 2–2.09 × as long as broad, with small micropilose area on each C 3 and C 4. Lower margin of clypeus subtruncate.

Mesosoma. Mesosoma 1.43–1.55 × as long as broad. Scutellum flat, 1.05–1.2 × as long as broad, frenal area weakly visible by sculpture. Propodeum 0.39–0.43 × as long as scutellum, with median carina and plicae, without costula and nucha. Fore wing 2.23–2.24 × as long as its maximum width; basal cell partly pilose; basal vein pilose; speculum closed below; M 1.04–1.07 × as long as PM and 1.37–1.46 × as long as S; stigma small.

Metasoma. Metasoma 1.73–1.97 × as long as broad, 1.46–1.49 × as long as mesosoma, 1–1.11 × as long as mesosoma and head. Ovipositor sheath projecting slightly beyond apex of metasoma.

Male. Unknown.

Material examined.

Holotype: Sweden • ♀; “ Sm. Oskarshamn Virkvarn 17 / 7.1961 K. J. Hedquist ”, “ Ernobius mollis ”, “ HOLOTYPUS Sigynia gen. n. ernobii sp. n. ♀ K-J Hedquist det. 1973 ”, “ Examined by Z. Bouček, 1980 ”, “ NHRS - HEVA 000002244 ”; deposited in NHRS.

Additional material.

Republic of Korea • 1 ♀; Gyeongsangnam-do, Geochang-gun, Namsang-myeon, Jeoncheok-ri , 35°37'15.3"N, 127°57'51.4"E, reared from Cryphalus fulvus Niisima on Pinus densiflora Siebold & Zucc. , 22.VI.2023, coll. E. Tselikh, S. Belokobylskij and J. Lee; ( NIBR) .

Distribution.

Czech Republic, Republic of Korea (new record), Sweden, ( Hedqvist 1974; Bouček and Rasplus 1991).

Biology.

Primary parasitoid of the beetle Ernobius mollis (Linnaeus, 1758) ( Anobiidae ) ( Hedqvist 1974). The bark beetle Cryphalus fulvus Niisima is reported as its host for the first time.

Figures

Figures 32–39. Sigynia ernobii Hedqvist, 1974, holotype female (32) 32 antenna. Not type female (33–39) 33 head, frontal view 34 body, lateral view 35 head and pronotum, dorsal view 36 fore wing 37 clypeus 38 body, dorsal view 39 mesosoma and propodeum, dorsal view.