Tersilochus (Tersilochus) turpiculus, Khalaim & Tereshkin, 2019

89. Tersilochus (Tersilochus) turpiculus sp. nov.

( Figs 10–19)

Holotype. Female, Russia, Primorsky Terr., Anisimovka , forest, meadows, 7.VI.1993, coll. S.A. Belokobylskij ( ZIN).

Paratype. One male, same data as for holotype ( ZIN) .

Comparative diagnosis. The new species is most easily recognised by the combination of distinct punctation on smooth and shining background of mesopleuron, without any vestiges of foveate groove ( Fig. 15), strongly depressed second metasomal tergite, and very short ovipositor ( Fig. 17). Tersilochus turpiculus sp.nov. is similar to T. grandiculus Khalaim, 2012 and T. punctator Khalaim & Lee, 2014 ( Khalaim et al., 2014) as these three species have extensively punctate head and mesosoma, and short ovipositor; but T. turpiculus sp. nov. distinct in lacking foveate groove on mesopleuron, in narrow clypeus separated from face by deep furrow, and in strongly depressed second metasomal tergite ( Fig. 17). In the key to Eastern Palaearctic species of Tersilochus ( Khalaim, 2012) , T. turpiculus sp. nov. does not correspond with either side of the first couplet as this species has punctate head and mesosoma, mesoscutum without notaulus, and mesopleuron without foveate groove.

Description. Female. Body length 3.9 mm, fore wing length 3.8 mm.

Head distinctly constricted and weakly round- ed behind eyes in dorsal view ( Fig. 13); gena 0.75 times as long as eye width. Clypeus lenticular, 2.7 times as broad as high, convex, separated from face by deep furrow (tentorial pits very deep), smooth, with fine punctures in upper half, and with weak transverse furrow in lower 0.75. Mandible robust, weakly tapered, with upper tooth somewhat longer than lower one. Malar space 0.8 times as long as basal mandibular width. Antennal flagellum weakly tapered towards apex (apices of both antennae broken); subbasal flagellomeres 1.6–1.8 times as long as wide; flagellomeres four to six with subapical finger-shaped structures on outer surface ( Fig. 14). Face and frons distinctly punctate on shallowly granulate to nearly smooth background. Vertex with fine and shallow punctures on very shallowly granulate and weakly shining background. Gena finely punctate on nearly smooth background. Occipital carina complete, arcuate dorsally.

Mesoscutum finely granulate, dull, with very fine (partly indistinct) punctures. Notaulus absent ( Figs 13, 14). Scutellum with lateral longitudinal carinae present in anterior 0.3 of scutellum. Mesopleuron smooth and shining, with fine and sharp punctures, and impunctate in centre ( Fig. 15). Foveate groove absent. Propodeum with weak basal keel which 0.4 times as long as apical area; dorsolateral area finely punctate on smooth or shallowly granulate background; apical area rounded anteriorly, flat; apical longitudinal carinae distinct, reaching transverse carina anteriorly. Propodeal spiracle separated from pleural carina by two diameters of spiracle.

Fore wing ( Fig. 16) with second recurrent vein (2 m-cu) distinctly postfurcal. Metacarpus (R 1) not reaching apex of wing. First abscissa of radius (Rs+ 2 r) straight, longer than width of pterostigma. Intercubitus (2 rs-m) very short and thick, shorter than abscissa of cubitus between intercu-

A.I. Khalaim & A.M. Tereshkin. Faunistic records and descriptions of Tersilochinae bitus and second recurrent vein (abscissa of M between 2 rs-m and 2 m-cu). Hind wing with subvertical nervellus (cu 1 and cu-a). Legs slender.

First metasomal tergite 3.1 times as long as posteriorly broad, entirely smooth; petiole trapeziform in cross-section; postpetiole in dorsal view strongly widened basally, much broader than petiole ( Fig. 19). Glymma deep, situated in posteri- or 0.65 of first tergite, joining to ventral part of postpetiole by deep and sharp furrow ( Fig. 17). Second tergite almost 1.3 times as long as wide anteriorly ( Fig. 19). Thyridial depression distinct, slightly elongate. Ovipositor very short, weakly upcurved ( Fig. 17); sheath half as long as first tergite.

Head, mesosoma and first tergite black ( Fig. 10); lower 0.3 of clypeus, mandible (teeth reddish) and mouthparts brownish yellow. Antenna dark brown to brownish black, scape and pedicel yellowish brown. Tegula brownish yellow. Pterostigma brown. Legs brownish yellow, hind coxa brownish black except apex. Metasoma behind first tergite predominantly yellow brown, dorsally blackish; second tergite with transverse pale band posteriorly.

Male. Flagellum with 22 flagellomeres, distinctly tapered towards apex. Apical area of propodeum somewhat pointed anteriorly ( Fig. 18). Tegula yellow. Second tergite twice as long as anteriorly broad. Thyridial depression twice as long as broad. Metasoma behind first tergite predominantly dark brown. Otherwise similar to female.

Etymology. The species is named from the Latin turpiculus (somewhat ugly).

Distribution. Russian Far East.