Tersilochus (Tersilochus) fidicinus Khalaim & Lee

Khalaim, Andrey I., Balueva, Ekaterina N., Kim, Ki-Beom & Lee, Jong-Wook, 2014, Review of the genus Tersilochus Holmgren (Hymenoptera, Ichneumonidae, Tersilochinae) from South Korea, Journal of Hymenoptera Research 36, pp. 27-51 : 30-32

Tersilochus (Tersilochus) fidicinus Khalaim & Lee sp. n. Figs 1-4

Description.

Female (holotype). Body length 4.8 mm. Fore wing length about 3.9 mm (apices of both wings absent).

Head roundly constricted behind eyes in dorsal view (as in Fig. 6); temple 0.84 times as long as eye width. Inner eye orbits parallel. Mandible with upper tooth much longer than lower tooth. Clypeus lenticular, 3.0 times as broad as long, in profile convex, with lower 0.3 bent backwards; sparsely punctate, very finely granulate and dull in upper 0.7. Malar space 0.5-0.6 times as long as basal width of mandible. Flagellum of antenna filiform, with 19 segments in holotype and 17 in paratype (Fig. 1); subbasal flagellomeres about 1.4 times and subapical flagellomeres about 1.2 times as long as broad; flagellomeres 4 to 6 with distinct subapical finger-shaped structures on outer surface. Face, frons, vertex, and temple distinctly granulate, dull, and impunctate. Mesosoma almost entirely densely granulate; lateral lobes of mesoscutum with fine punctures, and upper posterior corner of mesopleuron finely punctate on almost smooth and shining background. Notaulus very weak, with indistinct wrinkles. Foveate groove very weak, narrow, and short, situated in center of mesopleuron (Fig. 2). Propodeum mediodorsally with fine longitudinal wrinkles; basal part 0.43 times as long as apical area. Propodeal spiracle separated from pleural carina by 1.5-2.0 times diameter of spiracle (Fig. 2). Apical area almost flat, anteriorly widely rounded. Apical longitudinal carinae weak but complete. Fore wing with intercubitus rather long, equal by length to abscissa of cubitus between intercubitus and second recurrent vein. First abscissa of radius distinctly longer than width of pterostigma. Metacarpus ending far from apex of fore wing. Postnervulus intercepted somewhat below middle. Hind wing with nervellus slightly reclivous or vertical. Metasoma: first tergite 2.8 times as long as broad posteriorly, mostly smooth; petiole trapeziform in cross-section, very finely striate laterally. Glymma deep, situated slightly behind center of first tergite, joining by distinct furrow to ventral part of postpetiole. Second tergite as long as anteriorly broad. Thyridial depression deep, about 1.5 times as long as broad. Ovipositor evenly upcurved, with deep and sharp dorsal subapical notch (Figs 3, 4); sheath 1.8 times as long as first tergite.

Head (including clypeus), mesosoma, and first tergite black; palpi brownish yellow to brown; tegula yellow. Mandible blackish in basal 0.4, reddish brown centrally and with teeth reddish black. Antenna entirely black. Pterostigma brown with whitish marks on proximal and distal corners. Legs brownish yellow; coxae brownish black; first trochanters brownish. Metasoma behind first tergite predominantly dark brown.

Male. Unknown.

Comparison.

Differs from other species of the genus by the combination of long temple, granulate and impunctate head, and mesosoma (Figs 1, 2), weak foveate groove of mesopleuron (Fig. 2), elongate thyridial depression, and long ovipositor with sharp dorsal subapical notch (Figs 3, 4).

Variation.

Paratype almost exactly corresponds with the holotype. In paratype, flagellomeres are slightly shorter, propodeum is with weak basal keel, and ovipositor is slightly shorter than in the holotype.

Type material.

Holotype female, South Korea, Gangwon-do (GW), Taebaek-si, Hyeoldong, Mt. Taebaek, 37°05'N, 128°54'E, 14.V.1992, coll. J.W. Lee (YUG).

Paratype. 1 female (ZISP), South Korea, Gyeongbuk-do (GB), Uljin-gun, Seo-myeon, Wangpi-ri, Wangpicheon, Parkdaljae, Malaise trap, 24. VI– 31.VII.2012, coll. J.K. Choi.

Distribution.

South Korea.

Etymology.

Named after the Latin fidicinus (of lute playing).