Spathius daweiensis, Tang & Belokobylskij & Chen, 2015

Tang, Pu, Belokobylskij, Sergey & Chen, Xue-Xin, 2015, Spathius Nees, 1818 (Hymenoptera: Braconidae, Doryctinae) from China with a key to species, Zootaxa 3960 (1), pp. 1-132 : 38-40

Spathius daweiensis sp. nov.

( Fig. 10 )

Description. Female. Body length 5.2 mm; fore wing length 4.7 mm.

Head. Antennae slender, weakly setiform, more than 20-segmented (apical segments missing). Scape 1.8 × as long as its maximum width. First flagellar segment 5.0 × as long as its apical width, 1.4 × as long as second segment. Head not depressed, its width (dorsal view) 1.3 × median length. Head behind eyes roundly narrowed. Transverse diameter of eye 1.3 × length of temple. Ocelli arranged in triangle with base as long as its sides; POL: Od: OOL = 6: 6: 18. Vertex densely coarsely rugose-striate. Frons densely and transversely rugose-striate. Eye glabrous, 1.3 × as high as broad. Malar space 0.4 × eye height and 0.9 × basal width of mandible. Temple distinctly striate in upper half, smooth in lower half. Face coarsely rugose-reticulate, narrowly smooth medially; its width 1.4 × eye height and 1.1 × height of face and clypeus combined. Clypeal suture distinct. Occipital carina complete dorsally, not joined below with hypostomal carina being obliterated on short distance upper base of mandible.

Mesosoma. Length of mesosoma 2.0 × its height. Pronotal keel distinct, its posterior branch widely separated from posterior margin of pronotum. Mesoscutum highly and roundly elevated above pronotum. Mesoscutum with sparse and semi-erect setae along notauli and laterally; densely granulate, with rather long and more or less distinct rugae near notauli and laterally; lateral lobes medially with wide granulate areas, with two convergent posteriorly carinae and narrow rugosity between them in medioposterior half. Notauli complete, wide, deep anteriorly and shallow posteriorly, sparsely crenulate. Prescutellar depression shallow, with five carinae, 0.3 × as long as scutellum. Scutellum finely coriaceous-granulate, weakly convex, with distinct lateral carinae. Mesopleuron entirely granulate and rugose. Subalar depression shallow, wide, coarsely rugose-striate and granulate. Precoxal sulcus deep, sinuate, distinctly crenulate, running along entire length of lower part of mesopleuron. Propodeum with distinct tubercles, coarsely rugose-granulate in basal half, with areas more or less distinctly delineated by carinae; basal carina 2.3 × as long as anterior fork of areola; areola narrow and pentagonal; petiolate area distinctly separated from areola.

Wings. Fore wing 4.1 × as long as wide. Vein r distinctly arising behind middle of pterostigma. 3-SR: r: SR1: 2-SR = 23: 6: 28: 19. Second submarginal cell not narrowed distally, its length 2.8 × maximum width, 1.4 × length of first subdiscal cell. Vein cu-a weakly postfurcal. Vein m-cu postfurcal. Hind wing vein M+CU 0.5 × as long as vein 1-M. Vein m-cu distinctly antefurcal, weakly curved towards base of wing.

Legs. Hind coxa transversely striate and granulate dorsally, only granulate laterally and ventrally, with basoventral tooth and corner. Hind femur finely striate and granulate dorsally, finely coriaceous-granulate ventrally and laterally, 3.5 × as long as wide. Hind tibia apically with two spines on outer margin. Dorsal surface of hind tibia with long, sparse and semi-erect setae, their length 1.4–1.6 × maximum width of tibia. Hind tarsus 0.9 × as long as hind tibia. Hind basitarsus 0.6 × as long as second-fifth segments combined. Second segment of hind tarsus 0.5 × as long as basitarsus, as long as fifth segment (without pretarsus).

Metasoma. Petiole (lateral view) straight ventrally and distinct arched dorsally, with spiracular tubercles in basal third; sparsely striate in basal 0.7, densely striate in apical 0.3, with rugulosity between striae. Length of petiole 2.6 × its apical width (dorsal view), 1.9 × length of propodeum. Second tergite without separated laterotergite. Second suture indistinct. Median length of second and third tergites combined 1.4 × basal width of second tergite, 0.7 × as long as their maximum width. Second tergite densely finely striate, smooth laterally. Remaining tergites smooth. Ovipositor sheath 2.1 × as long as petiole, as long as metasoma, 1.5 × as long as mesosoma, 0.7 × as long as fore wing.

Colour. Body dark brown; head brown; scutellum brownish yellow. Petiole dark brown; second and third tergites dark brown in basal two-thirds, brownish yellow in apical third; fourth and fifth tergites dark brown basally and apically, brownish yellow medially; sixth tergite brownish yellow. Antenna brownish yellow basally, darkened toward apex. Palpi pale yellow. Legs pale brownish yellow, fore and middle coxae, all trochanters pale yellow; hind coxa brownish yellow; hind femur darken apically. Ovipositor sheath brown, but medially widely pale brown. Fore wing distinctly infuscate. Pterostigma brown, yellow basally and apically.

Male. Unknown.

Material examined. Holotype: female, China, Yunnan Prov., Pingbian Daweishan , 18.VII.2008, Xu Zaifu, No. 20055034 ( ZJUH).

Comparative diagnosis. This new species belongs to the S. moderabilis Wilkinson species group. Spathius daweiensis sp. nov. is similar to S. gutianensis sp. nov., but differs in having the temple distinctly striate in upper half (smooth in S. gutianensis ), temple longer with transverse diameter of eye 1.3 × length of temple (shorter, with transverse diameter of eye 1.8 × length of temple in S. gutianensis ), mesopleuron almost entirely granulate and rugose (mostly smooth in S. gutianensis ), third and fourth metasomal tergites smooth (third tergite densely striate and fourth tergite finely striate in basal half in S. gutianensis ), ovipositor sheath longer, as long as metasoma (shorter, 0.5 × as long as metasoma in S. gutianensis ), and wing distinctly infuscate (faintly infuscate in S. gutianensis ).

Etymology. From the name of mountain of the type locality of species.

Distribution. China (Yunnan).

Figures

FIGURE 10. Spathius daweiensis sp. nov. A, habitus, lateral aspect; B, head, frontal aspect; C, head, dorsal aspect; D, fore wing; E, petiole, lateral aspect; F, mesosoma, lateral aspect; G, mesoscutum, dorsal aspect; H, metasoma, dorsal aspect. Scale bar 0.5 mm.