Cosmophorus (Eucosmophorus) wandoensis, Belokobylskij & Ku, 2023

Belokobylskij, Sergey A. & Ku, Deokseo, 2023, Braconid imagobionts from the tribe Cosmophorini (Hymenoptera, Braconidae, Euphorinae) in the fauna of South Korea, Journal of Hymenoptera Research 96, pp. 129-154 : 129

Cosmophorus (Eucosmophorus) wandoensis sp. nov.

Figs 5 , 6

Type material.

Holotype: female, "Korea (JN), Jangjoa-ri, Wando-eup, Wando-gun, VIII.29-IX.12.2020 (Malaise Trap), Ku Deokseo, Lee Jaehyeon " (NIBR).

Description.

Female. Body length 2.6 mm; fore wing length 2.0 mm.

Head: Width of head 1.8 times its median length, 1.5 times its maximum length, 1.6 times its height, 1.3 times width of mesoscutum. Vertex without medial longitudinal depression. Occiput distinctly concave. Temples behind eyes distinctly and roundly narrowed, ~1.2 times longer than transverse diameter of eye. Frons medially very weakly concave, with low double longitudinal carinae, which are fused medially and distinctly divergent anteriorly. Ocelli medium-sized, arranged in triangle with base 1.4 times its lateral sides; posterior margin of anterior ocellus placed distinctly before line between anterior margins of lateral ocelli. POL 2.0 times Od, 0.8 times OOL. Eye subround, without setae, 1.1 times as high as broad. Malar suture present and distinct. Malar space narrow, 0.2 times height of eye, 0.4 times basal width of mandible. Antennal protuberances with one wide and long acuminate apical anteromedial tooth. Cly-peus narrow, straight ventrally. Upper tentorial pit distinct, situated between eye and antennal socket and connected with socket outer border. Face 2.3 times wider than its medial height. Mandible wide, widened towards subapex and then narrowed towards apex, with small but distinct ventral tubercle on lower margin, with two wide apical teeth, anterior (upper) tooth longest and acuminate, posterior (lower) tooth short and less acuminate. Length of mandible 2.7 times its maximum width. Occipital carina present only laterally, absent widely upper, below fused with hypostomal carina.

Antenna: Antenna weakly thickened, almost setiform, 21-segmented, flagellum not compressed. Scape subcylindrical, not depressed, without pointed apical teeth in anterior side; length of scape 1.1 times its maximum width, almost as long as pedicel. First flagellar segment 3.7 times longer than its apical width, 0.9 times as long as second segment. Second flagellar segment 3.0 times longer than apical width. Length of penultimate segment 2.7 times its width, 1.1 times longer than apical segment; the latter weakly acuminate.

Mesosoma: Length of mesosoma 1.6 times its maximum height. Dorsal part of mesosoma weakly convex. Notauli present on vertical part of mesoscutum only and crenulate, completely absent on its horizontal part. Prescutellar depression rather short, with four carinae, almost smooth between carinae, 0.3 times as long as scutellum. Scutellum without transverse posterior depression, weakly sculptured in posterior 1/3. Subalar depression shallow, wide and densely rugose-areolate. Precoxal sulcus distinct, long, rather wide, crenulate-rugulose, curved up posteriorly and prolonged towards mesopleural pit and pleural suture (fused with additional oblique crenulate furrow). Prepectal carina absent. Mesosternal furrow narrow and shallow, rugulose.

Wings: Length of fore wing 2.6 times its width. Length of pterostigma 2.3 times its maximum width. Metacarp (1-R1) strongly desclerotised and lost distally. Radial (marginal) cell strongly shortened, open apically; anterior margin of radial (marginal) cell 0.9 times as long as pterostigma and 2.5 times as long as distance from apex of radial (marginal) cell to apex of wing. Radial vein (r) arising slightly behind middle of pterostigma, its first abscissa (r) strongly thickened and very short, 0.2 times as long as maximum width of pterostigma. Second abscissa of radial vein (3-SR + SR1) evenly regularly curved and transparent, absent apically at short distance. Parallel vein (CU1a) almost straight and unsclerotised, subinterstitial to mediocubital vein (2-CU1). Recurrent vein (m-cu) forming weak obtuse corner with first radiomedial vein (2-SR). Nervulus (cu-a) short and strongly postfurcal, distance from basal vein (1-M) to nervulus (cu-a) twice nervulus (cu-a) length. Hind wing 4.7 times longer than wide. Second abscissa of costal vein (1-SC+R) completely absent; fourth abscissa of costal vein (SC+R1) almost absent in distal half. Medial (basal) cell antero-distally and submedial (subbasal) cell distally open. Recurrent vein (m-cu) sclerotised, pigmented and almost interstitial.

Legs: Hind femur 3.6 times longer than wide. Hind tarsus 0.9 times hind tibia, its second segment 0.4 times as long as first segment, 0.9 times as long as fifth segment (without pretarsus).

Metasoma: First tergite rather long, weakly and almost linearly widened posteriorly, spiracular tubercles absent, dorsope very small. Apical width of first tergite 1.7 times its minimum width, length approximately 1.6 times its apical width and length of propodeum. Suture between second and third tergites present, but fine, distinct medially and almost absent laterally Length of second tergite almost equal to its basal width, 1.4 times length of third tergite. Ovipositor compressed, with three arcuate and not equivalent sections in its apical 1/3, distal section longest and crescent. Ovipositor sheath weakly widened to apical quarter, ~ 1.2 times longer than metasoma, 1.5 times longer than mesosoma, 0.7 times as long as fore wing.

Sculpture and pubescence: Head mainly smooth, face weakly rugulose-punctate. Sides of pronotum coarsely reticulate-areolate in lower half and in posterior quarter, mainly smooth on remaining part. Mesoscutum finely rugulose-granulate on anterior vertical part, entirely smooth on posterior horizontal surface; scutellum mainly smooth, rugulose in narrow posterior quarter. Mesopleuron smooth medially and below, rugulose-reticulate anteriorly and ventro-posteriorly. Propodeum entirely reticulate-areolate, areas enlarged posteriorly, without mediolateral areas and posterior transverse carina. Legs smooth. First metasomal tergite densely reticulate-rugulose. Second tergite mainly small reticulate-areolate, smooth on rather large latero-posterior areas. Remaining tergites smooth. Vertex entirely with relatively dense, short and semi-erect yellow setae directed laterally; mesoscutum almost entirely with short and rather densely yellowish setae.

Colour: Body reddish brown to dark reddish brown, metasoma in latero-posterior half almost black; propodeum dorsally and first metasomal tergite paler; mandible, lower median part of prothorax, and metapleuron yellow to yellowish brown. Antennae mainly brown to dark brown, three basal segments brownish-yellow. Palpi pale yellow. Legs yellow to pale brown, hind femur mainly brown. Ovipositor sheath dark brown to black. Wings faintly evenly infuscate. Pterostigma dark brown, pale basally at very short distance.

Male. Unknown.

Comparative diagnosis.

The new species is similar to C. (Eu.) breviceps (Quicke & van Achterberg, 2000), which was described from Malaysia (Sabah) ( van Achterberg and Quicke 2000), but differs from the latter species by having the eye in dorsal view ~1.2 times longer than the temple (1.5 times in C. breviceps ), temple distinctly convex in dorsal view (weakly convex in C. breviceps ), teeth of the scape distinctly protruding dorsally (weakly protruding in C. breviceps ), frons with distinct but not high carinae divergent anteriorly (without carinae in C. breviceps ), mandible with two apical teeth (only with one tooth in C. breviceps ), area below and behind the mandibular base smooth (rugose-striate in C. breviceps ), and the second metasomal tergite densely reticulate-areolate (sparsely longitudinally rugose in C. breviceps ).

Etymology.

This species is named after its type locality, Wando Islands

Distribution.

Korean Peninsula.

Figures

Figure 5. Cosmophorus (Eucosmophorus) wandoensis sp. nov. (female, holotype) A habitus, dorsal view B habitus, lateral view C mandible D apical segments of antenna E head, front view F head, dorsal view G head and basal segments of antenna, lateral view H mesosoma and first tergite, dorsal view I mesosoma and first tergite, lateral view J hind leg K tip of ovipositor, lateral view.

Figure 6. Cosmophorus (Eucosmophorus) wandoensis sp. nov. (female, holotype) A wings B propodeum and metasoma, dorsal view C propodeum and metasoma, lateral view.