Taiwanhormius austrokoreanus, Belokobylskij & Ku, 2025

Belokobylskij, Sergey A. & Ku, Deokseo, 2025, The genus Taiwanhormius Belokobylskij, 1998 (Hymenoptera: Braconidae: Hormiinae) in Korean Peninsula, Zootaxa 5620 (3), pp. 451-460 : 453-456

Taiwanhormius austrokoreanus sp. nov.

http://zoobank.org/ urn:lsid:zoobank.org:act:24878DF1-EDDF-42B7-976C-652BD92C5AC4

Figs 1 , 2

Holotype: female, “S. Korea, Gyeongsangnam-do, Sancheong-gun, 30 km NNW Jinju (Chinju ), forest, bush, h = 800 m, 29.06.2002, S. Belokobylskij ” ( NIBR).

Paratypes. 1 female, (GN) Geochang-gun, Science Museum of Natural Enemies , 8–23.IX.2021 (Deokseo Ku, Jaehyeon Lee) ( SMNE) ; 1 female (without metasoma), (GN) Geoje-si, Dongbu-myon, Gucheon-ri, Pyeongji, Mt. Nojasan , sweeping, 7.XI.1997 (Hwangjun Jo) ( SMNE) ; 2 females, ( GN) Geoje-si, Sadeung-myeon, Oryang-ri , Malaise trap, 34°52’50.67” N, 128°30’30.48” E, 15–29.VIII.2017 (Hyung-Keun Lee) ( SMNE, ZISP) ; 1 female, 1 male, (GN) Sancheong-gun, 30 km NNW of Jinju , forest, bush, h = 800 m, 10.VII.2002 (S. Belokobylskij) ( ZISP) ; 1 male, same label, but 16.VI.2002 ( ZISP) ; 1 female, (GN) Geochang-gun, Namsang-myeon, Jeoncheok-ri , 35°37ˊ15.3ˊˊ N, 127°57ˊ51.4ˊˊ E, 26.VI.2022 (E. Tselikh) ( ZISP) ; 1 male, ( GN) Namhae-gun, Namhae-eup, Asanri , 34°51′06.7″N, 127°51′31″E, 19.VI.2022 (E. Tselikh) ( ZISP) ; 1 female, ( GN) Geochang-gun, Namha-myeon, Yanghang-ri , 36.675197 N, 127.948057 E, 25, 27.VI.2023 (E. Tselikh), ( ZISP) ; 1 male, ( GN) Namhae-gun, Seomyeon, Nogu-ri, Temple Mangunsa , 13.VIII.2022 (Deokseo Ku, Jaehyeon Lee, Hyojin Jeong) ( SMNE) ; 1 male, (GB) Gyeongju-si, Gangdong-myeon, Dangu-ri , Malaise trap, 36°3’48.06” N, 129°16’16.25”E, 25.V–19.VI.2017 (Hyung-Keun Lee) ( SMNE) ; 1 male, ( JB) Wanju-gun, Unju-myeon, Godang-ri , Malaise trap, 36°2ʹ8.35ʺN, 127°20ʹ35.94ʺE, 26.V–8.VI.2017 (Hyung-Keun Lee) ( SMNE) ; 1 female, 1 male, (JN) Gangjin-gun, Gundong-myeon, Deokcheonri , Malaise trap, 34°55’47.64” N, 126°57’49.37” E, 11–25.IX.2017 (Hyung-Keun Lee) ( SMNE) ; 1 female, same locality, but 17–31.VII.2017 ( SMNE) ; 2 males, same locality, but 25.IX–9.X.2017 ( SMNE) ; 1 female, 2 males, (JN) Suncheon-si, Seokhyeon-dong , Malaise trap, 34°58’56.59” N, 127°27’40.56” E, 12–25.IX.2017 (Hyung-Keun Lee) ( SMNE) ; 1 male, same locality, but 25.IX–9.X.2017 ( SMNE) .

Description. Female. Body length 1.6–1.8 mm; fore wing length 1.5–1.6 mm.

Head width 1.5–1.7 × its medial length, 1.3–1.5 × width of mesoscutum. Temple distinctly roundly narrowed behind eye. Transverse diameter of eye 1.9–2.2 × longer than temple. Ocelli relatively small, POL 1.0–1.5 × Od, about 0.5 × OOL. Eye oval, 1.2–1.3 × as high as broad. Malar space 0.4–0.5 × eye height, 1.2–1.5 × basal width of mandible. Face width 0.8–0.9 × eye height and 0.8–0.9 × height of face and clypeus combined. Hypoclypeal depression subcircular, its width 0.8–1.0 × distance from edge of depression to eye, 0.4–0.5 × width of face. Head distinctly and weakly-curvedly narrowed below eyes (front view).

Antennae filiform or weakly setiform, with 17–19 antennomeres, about 1.5 × longer than body. Scape 1.3–1.5 × longer than maximum width, 1.4–1.5 × longer than pedicel. First flagellomere 5.5–6.0 × longer than its apical width, 0.9–1.0 × as long as second flagellomere. Penultimate flagellomere 4.0–5.0 × longer than its width, weakly shorter than or equal to apical flagellomere.

Mesosoma. Length 1.6–1.8 × its height. Neck of prothorax weakly concave anteriorly (dorsal view), with distinct transverse dorsal carinae in anterior third, with two longitudinal lateral carinae. Lateral oblique furrows of prothorax sides wide and crenulate-rugose. Mesoscutum 0.7–0.8 × as long as its maximum width (dorsal view). Prescutellar depression usually widely or at least partly rugulose, 0.40–0.45 × length of scutellum. Subalar depression shallow and relatively wide, entirely distinctly rugulose. Precoxal sulcus deep, weakly curved, distinctly crenulate, with subrounded depression posteriorly. Propodeum distinctly and weakly-roundly narrowed posteriorly (lateral view).

Wing. Length of fore wing 3.0–3.2 × its maximum width. Pterostigma 4.5–5.5 × longer than wide. Metacarp (1- R1) 1.3–1.4 × longer than pterostigma. Radial vein (r) arising from middle of pterostigma and almost perpendicular or only weakly oblique to it. First radial abscissa (r) 1.0–1.2 × as long as maximum width of pterostigma. Second radial abscissa (3-SR) 1.9–2.4 × longer than first abscissa (r), 0.35–0.50 × as long as third abscissa (SR1), 1.0–1.3 × longer than first radiomedial vein (2-SR). Length of second radiomedial (submarginal) cell 2.5–3.0 × its maximum width, 1.3–1.4 × longer than narrow brachial (subdiscal) cell. Nervulus (cu-a) interstitial to basal vein (1-M). Brachial (subdiscal) cell distally closed distinctly before recurrent vein (m-cu). Parallel vein (CU1a) interstitial to cubital vein (2-CU1). Hind wing narrow, 6.0–6.3 × longer than its maximum width.

Legs. Hind femur 5.3–5.8 × longer than its maximum width. Hind tarsus 1.0–1.1 × as long as hind tibia. Hind basitarsus almost as long as second–fifth segments combined. Second tarsal segment 0.3 × as long as basitarsus, about as long as fifth segment (without pretarsus).

Metasoma 0.8–0.9 × as long as mesosoma and head combined. First tergite relatively long and widened towards apex, dorsal carinae weakly curved. Apical width of first tergite 1.8–2.3 × larger than its minimum width; length 1.1–1.2 × its apical width. Median length of second tergite 0.8–0.9 × as long as its basal width, 2.0–2.5 × length of third tergite. Second suture weakly curved. Ovipositor sheath 0.4–0.6 × as long as metasoma, 0.5–0.7 × as long as mesosoma, 0.25–0.30 × as long as for wing.

Sculpture and pubescence. Head entirely smooth. Mesoscutum mainly distinctly granulate and partly coriaceous, usually its medial lobe medially smooth at least on narrow area. Scutellum medially smooth or almost smooth, coriaceous at least marginally. Mesopleuron smooth. Propodeum with distinct areas; antero-lateral areas densely granulate and at least partly with rugulosity, remaining propodeum entirely coarsely rugose; areola 1.3–1.8 × longer than wide; antero-medial longitudinal carina relatively short, 0.5–1.0 × as long as anterior fork of areola. First metasomal tergite entirely densely rugose-reticulate, without granulation. Following metasomal tergites mainly widely smooth, only sometimes partly sparsely punctate. Hind tibia with relatively long and semi-erect pale setae on its dorsal margin, length of these setae 0.8–1.2 × as long as maximum width of hind tibia. Ovipositor sheath with dense, relatively short and semi-erect setae.

Colour. Head light reddish brown to reddish brown, but dark reddish brown dorsally and sometimes posteriorly, face and head in lower third or half brownish yellow or pale brown. Mesosoma light reddish brown, partly or sometimes almost entirely and faintly infuscate dorsally, but rarely it mainly dark brown. Metasoma brown or dark brown, usually medially widely yellow or pale brown, yellow or whitish yellow to brownish yellow ventrally. Antennae with four–five basal antennomeres yellow to yellowish brown or pale brown, submedial (six–seven) and apical (two–three) antennomeres brown to dark brown, sometimes almost black; four–five subapical antennomeres white. Palpi yellow. Legs entirely yellow or brownish yellow, pale basally. Ovipositor sheath brown, pale brown basally. Wings subhyaline or faintly infuscate. Pterostigma entirely yellow, grayish yellow or pale brown.

Male. Body length 1.3–1.6 mm; fore wing length 1.3–1.4 mm. Antenna weakly thicker, setiform, entirely dark in apical half, in large specimen with 19 antennomeres. First flagellomere 4.0–5.0 × longer than its apical width, 1.00–1.05 × as long as second flagellomere. Mesoscutum usually weakly granulate and often with wide smooth medial or posterior areas. Hind femur less narrow, 4.8–5.6 × longer than maximum width. Metasoma narrow. First metasomal tergite narrow, 1.4–1.6 × longer than apical width. Body sometimes mainly dark; in dark form legs infuscate. Otherwise similar to female.

Comparative diagnosis. This new species is very similar to T. granulosus Belokobylskij ( Figs 3 , 4 ), but differs from it by having the malar space almost equal to or only weakly larger than basal width of mandible (1.5 × larger in T. granulosus ), prescutellar depression entirely or widely rugulose (entirely smooth in T. granulosus ), nervulus (cu-a) of fore wing interstitial to basal vein (1-M) or weakly antefurcal (distinctly postfurcal in T. granulosus ), brachial (subdiscal) cell of fore wing distally usually closed distinctly before recurrent vein (m-cu) (on or only weakly before the level of recurrent vein in T. granulosus ), medial lobe of mesoscutum smooth or almost smooth medially (mesoscutum entirely granulate in T. granulosus ), and the first metasomal tergite entirely coarsely rugulose-reticulate and without granulation (tergite weakly rugulose-granulate in T. granulosus ).

Distribution. Korean Peninsula.

Figures

FIGURE 1. Taiwanhormius austrokoreanus sp. nov. (female, holotype). (A) Habitus, lateral view. (B) Head, front view. (C) Head and mesonotum, dorsal view. (D) Head and mesosoma, lateral view. (E) Apical antennomeres. (F) Mesosoma and first metasomal tergite, dorsal view. (G) Mesosoma and first metasomal tergite, lateral view. (H) Hind leg.

FIGURE 2. Taiwanhormius austrokoreanus sp. nov. (female, holotype). (A) Wings. (B) Propodeum and metasoma, dorsal view. (C) Metasoma and ovipositor, lateral view.

FIGURE 3. Taiwanhormius granulosus Belokobylskij, 1988 (male, paratype). (A) Habitus, lateral view. (B) Head, front view. (C) Head and mesoscutum, dorsal view. (D) Head and anterior part of mesosoma, lateral view. (E) Basal antennomeres. (F) Apical antennomeres. (G) Mesosoma, dorsal view. (H) Head and mesosoma, lateral view. (I) Hind leg.

FIGURE 4. Taiwanhormius granulosus Belokobylskij, 1988 (male, paratype). (A) Wings. (B) Propodeum and metasoma, dorsal view. (C) Propodeum and metasoma, lateral view.