Tersilochus (Tersilochus) punctator 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 : 40-44

Tersilochus (Tersilochus) punctator Khalaim & Lee sp. n. Figs 41-51

Description.

Female (holotype). Body length 5.2 mm. Fore wing length 4.4 mm.

Head rounded behind eyes in dorsal view (Fig. 41); temple 0.72 times as long as eye width. Inner eye orbits more or less parallel (Fig. 42). Mandible with upper tooth somewhat longer than lower tooth. Clypeus lenticular with lower margin slightly truncate, 2.9 times as broad as long, smooth, and sparsely punctate in upper 0.6, in profile weakly convex (Fig. 42). Malar space 0.8 times as long as basal width of mandible. Flagellum of antenna distinctly tapered towards apex, with 26 segments (Fig. 43); subbasal flagellomeres 1.5-1.6 times and subapical flagellomeres 1.2-1.3 times as long as broad; flagellomeres 2 to 6 with small subapical finger-shaped structures on outer surface (Fig. 44, arrows). Face, frons, and vertex densely punctate on granulate surface and dull (Figs 41, 42). Temple moderately densely punctate, almost smooth, and weakly shining between punctures. Notaulus with irregular wrinkles. Mesoscutum granulate, finely and densely punctate. Foveate groove about 0.8 times as long as mesopleuron, weakly curved, narrow, with fine transverse wrinkles, not reaching prepectal carina anteriorly (Fig. 46). Mesopleuron distinctly punctate, granulate, and dull below foveate groove, and mostly smooth and shining between punctures above foveate groove (Fig. 46). Propodeum mediodorsally with strong median and two weaker lateral wrinkles, basal part 0.38 times as long as apical area (Fig. 47). Dorsolateral area of propodeum finely granulate, finely and sparsely punctate. Propodeal spiracle separated from pleural carina by almost 2.0 times diameter of spiracle (Fig. 45). Apical area flat, anteriorly rounded (Fig. 47). Apical longitudinal carinae distinct posteriorly and indistinct anteriorly. Fore wing with intercubitus thickened, somewhat longer than abscissa of cubitus between intercubitus and second recurrent vein. First abscissa of radius longer than width of pterostigma. Metacarpus almost reaching apex of fore wing. Postnervulus intercepted below middle. Hind wing with nervellus vertical. Metasoma: first tergite 2.5 times as long as broad posteriorly, mostly smooth, with petiole trapeziform in cross-section and well separated from postpetiole in dorsal view. Glymma small, situated in apical 0.6 of first tergite, joining by distinct furrow to ventral part of postpetiole (Figs 45, 48). Second tergite distinctly transverse, 0.8 times as long as anteriorly broad (Fig. 49). Thyridial depression as long as broad (Fig. 49). Ovipositor very short, weakly upcurved, thickened near apex, with dorsal subapical depression and small notch before this depression (Fig. 50, arrow); sheath 0.6 times as long as first tergite.

Head, mesosoma, and first tergite black; palpi, mandible (teeth reddish black), lower 0.3 of clypeus, and tegula brownish yellow. Antenna with scape and pedicel yellow-brown, flagellum black. Pterostigma dark brown. Legs brownish yellow; fore and mid coxae basally brown; hind coxae brownish black; hind femur centrally with brownish black mark on outer side. Metasoma behind first tergite predominantly yellow-brown ventrally and laterally, tergites 2 and 3 dorsally extensively black with narrow yellow-brown band posteriorly, tergites 4 and 5 with dorsal blackish areas smaller.

Male. Unknown.

Comparison.

This is the only species of the genus Tersilochus in South Korea with densely punctate mesopleuron (Fig. 46). It differs from other Palaearctic species of Tersilochus by the combination of densely punctate and smooth mesopleuron between punctures, well-developed foveate groove (Fig. 46), long metacarpus, and very short ovipositor (Figs 48, 50). It is similar to the Russian Far East Tersilochus grandiculus Khalaim but distinct in having less slender flagellum of antenna, less punctate head, and shorter second tergite.

Remarks.

One female from southeast China generally corresponds well with this species (including small subapical finger-shaped structures on flagellomeres 2-5) but has a flagellum with 20 segments, mesopleuron with weaker punctures and centrally mostly finely granulate, propodeal spiracle separated from pleural carina by half diameter of spiracle, thyridial depression almost twice as long as broad, and ovipositor strongly clavate, with conspicuous dorsal subapical depression and rounded tooth before this depression (Fig. 51). This specimen may belong to an undescribed species, so study of an additional material is needed.

Type material.

Holotype female, South Korea, Gyeongbuk-do (GB), Yeongju-si, Punggi-eup, Jungnyeong, 35°53'42.7"N, 128°26'22.0"E, Malaise trap, Site-99, 3-12.VI.2009, coll. C.J. Kim (YUG).

Additional material.

China, Jiangxi reg., Jiulianshan, 27.IV.2011, coll. M.-L. Sheng, 1 female (deposited in General Station of Forest Pest Management, State Forestry Administration, P.R. China).

Distribution.

South Korea,?China (Jiangxi).

Etymology.

Named on account of its densely punctate mesopleuron.