Leiophron (Leiophron) pubiscutum, Ku & Samartsev & Belokobylskij, 2020

Ku, Deok-Seo, Samartsev, Konstantin G. & Belokobylskij, Sergey A., 2020, New species of Euphorinae parasitoids of the family Braconidae (Hymenoptera) from South Korea, Zootaxa 4742 (2), pp. 256-270 : 260-263

Leiophron (Leiophron) pubiscutum sp. nov.

Figs 3 , 4

Type material. Holotype: female, “ Korea, Gyeongnam, Chinju, Chojeon-dong (at Mercury lamp), 7–8.VII.1995, Deok-seo Ku ” [ NIBR].

Paratypes. 4 females, 2 males, National Institute of Forest Science, Hongneung , Seoul, light trap, 11.VIII.1998 (S.-H. Kang leg.) ( SMNE, ZISP) ; 3 males, same locality, light trap, VII.1998 (S.-H. Kang leg.) ( SMNE, ZISP) ; 1 female, Korea, Gyeongnam, Chinju-shi, Kajwadong , 14.VII.1993 (D.-S. Ku leg.) ( SMNE) ; 1 male, same label, but 18.V.1993 ( SMNE) ; 1 female, 1 male, Korea, Gyeongnam, Chinju, Chojeon-dong, at Mercury lamp, 31.VII– 1.VIII.1995 (D.-S. Ku leg.) ( SMNE, ZISP) ; 1 male, same label, but 30–31.VII.1995 ( SMNE) .

Description. Female. Body length 1.2–1.4 mm; fore wing length 1.0– 1.1 mm.

Width of head (dorsal view) 1.3 × its median length, 1.4 × width of mesoscutum. Temples behind eyes (dorsal view) weakly convex in anterior half and roundly narrowed in posterior half; transverse diameter of eye 1.4–1.5 × length of temple. Frons weakly convex, without median carina, furrow or pit. Ocelli arranged in triangle with base 1.5 × its lateral sides; POL 2.5–3.0 × Od, 0.8–1.1 × OOL. Eye with rather distinct and dense pale setae, 1.3 × as high as broad. Malar suture distinct. Malar space 0.7–0.8 × basal width of mandible, 0.25–0.30 × height of eye. Face weakly convex, width of face 1.0–1.1 × its median height, 0.55–0.60 × height of eye. Distance between tentorial pits 4.0–4.5 × distance from pit to eye. Width of clypeus 2.4–2.7 × its median height, 1.3–1.4 × width of face; clypeus with short prominent ventral margin. Head distinctly and weakly-roundly narrowed below eyes (front view). Occipital carina dorsally incomplete, widely interrupted, rarely with fine track; fused with hypostomal carina below.

Antenna thickened, weakly claviform, 13-segmented, about 0.5 × as long as body. Scape 1.7–1.9 × longer than wide. First flagellar segment 2.5 × longer than its apical width, 1.1–1.2 × longer than second segment, which is 1.5–1.6 × longer than its maximum width. Length of penultimate segment 1.00–1.15 × its width, 0.6 × length of apical segment; last segment obtuse apically or weakly acuminate and without spine.

Mesosoma. Length 1.5–1.6 × its maximum height. Mesoscutum 0.85–0.95 × as long as maximum width. Notauli distinct only anteriorly on vertical part of mesoscutum, completely absent on its horizontal part. Prescutellar depression long, with high median carina, finely rugulose, 0.4 × as long as scutellum. Scutellum convex, without transverse depression posteriorly. Subalar depression distinct, rather wide, almost smooth. Sternaulus deep anteriorly and shallow posteriorly, rather narrow, sinuate, rugulose-crenulate, with shallow furrow from posterior part of sternaulus to hind coxa. Mesopleuron with shallow smooth oblique furrow from mesopleural pit to sternaulus or without it.

Wings. Length of fore wing 2.7–3.0 × its width. Length of pterostigma 2.1–2.3 × its maximum width. Radial (marginal) cell strongly shortened, narrow or sometimes very narrow, 2.5–3.5 × longer than wide. Metacarpus (1-R1) 0.2–0.3 × as long as pterostigma, 0.45–0.65 × as long as width of pterostigma. Radial vein (r) with single evenly curved abscissa (r), which is often strongly desclerotised in distal half, arising distinctly behind middle of pterostigma and separately from first radiomedial vein (2-SR). First radiomedial vein (2-SR) strongly desclerotised, more or less distinct only near pterostigma. Recurrent vein (m-cu) strongly desclerotised, indistinct or almost indistinct. Discoidal (discal) cell petiolate anteriorly, 1.5–1.8 × longer than wide. Nervulus (cu-a) weakly postfurcal. Basal vein (1-M) weakly thickened. Second abscissa of longitudinal anal vein (2-1A) sclerotized basally at rather long distance. Medial (basal) cell sparsely setose, glabrous in basal third. In hind wing, nervellus (cu-a) absent; medial (basal) cell narrow.

Legs. Hind femur elongate-oval, 3.2–3.5 × longer than its maximum width. Hind tarsus about as long as hind tibia, its second segment 0.50–0.55 × as long as first segment, 0.8–0.9 × as long as fifth segment (without pretarsus). Fifth segment of fore and of middle legs weakly thickened. Claws simple.

Metasoma 1.0–1.2 × as long as mesosoma. First tergite distinctly and more or less evenly widened towards apex, without spiracular tubercles, with distinct dorsope. Apical width of first tergite 1.8 × its minimum width, its length 1.3–1.4 × apical width, weakly longer than propodeum. Length of second and third tergites combined 1.7–2.0 × basal width of second tergite, 1.00–1.25 × their maximum width.

Sculpture and pubescence. Head mainly smooth, face very densely and finely punctate. Mesoscutum finely and densely punctulate. Scutellum and mesopleuron smooth. Propodeum finely reticulate-rugulose, partly almost smooth, with several and usually irregular areas deliniated by distinct carinae. Hind coxa mainly smooth. First metasomal tergite longitudinally striate, with fine reticulation between striae. Mesoscutum widely in dense, rather long and semi-erect pale setae, almost glabrous on narrow lateral areas. Frons and face in dense white semi-erect to erect setae.

Colour. Body mainly brownish-yellow, metasoma brown to dark brown in posterior half laterally and apically. Antenna mainly brown, five basal segments yellow. Palpi yellow. Legs yellow. Wings faintly infuscate. Pterostigma brown, pale yellow to subhyaline in basal third.

Male. Propodeum more coarsely rugulose, with carinae sometimes almost hided by surrounding sculpture. Body sometimes darker. Otherwise very similar to female except sexual features.

Comparative diagnosis. This new species is similar to Leiophron (L.) apicalis Haliday, 1833 , but differs in having the occipital carina complete dorsally (widely interrupted in P. apicalis ), antenna only 13-segmented (always more than 13-segmented in P. apicalis ), basal flagellar segment shorter, 2.5 × longer than wide (longer, 3.7–4.0 × longer than wide in P. apicalis ), mesoscutum mostly with dense and rather long setae (almost glabrous in P. apicalis ), first metasomal tergite wide and more or less linearly striate (narrow and rugose in P. apicalis ).

Etymology. This species is named from Latin “pubis” (pubescent) and “scutum” (shield) because the mesoscutum is distinctly pubescent.

Figures

FIGURE 3. Leiophron (Leiophron) pubiscutum sp. nov. (A, C–G—female, holotype; B—male, paratype). A, B. Fore wing. C. Hind wing. D. Head and antenna, dorsal view. E. Mesosoma and first metasomal tergite, dorsal view. F. Habitus, lateral view. G. Propodeum and metasoma, dorsal view.

FIGURE 4. Leiophron (Leiophron) pubiscutum sp. nov. (A, C, D, F, G—female, holotype; B, E—male, paratype). A. Antenna, head and mesosoma, lateral view. B. Fore leg, front view. C. Head and fore leg, front view. D, E. Head and mesosoma, lateral view. F. Head, front view. G. Metasoma, lateral view.