Orthogonalys robusta, Chen, Hua-yan, van Achterberg, Cornelis, He, Jun-hua & Xu, Zai-fu, 2014

Chen, Hua-yan, van Achterberg, Cornelis, He, Jun-hua & Xu, Zai-fu, 2014, A revision of the Chinese Trigonalyidae (Hymenoptera, Trigonalyoidea), ZooKeys 385, pp. 1-207 : 59-61

Orthogonalys robusta sp. n. Figs 231-241

Type material.

Holotype, ♀ (SCAU) "[China:] Shaanxi, Mt. Taibai, 107°53.505'E, 34°07.430'N, 1580 m, 30.VI.1999, Xiao-yu Jiang, SCAU 272". Paratypes: 2 ♀ (IZCAS) "[China:] Shaanxi, Ningshan, Dashuigou, 1500-1760 m, 30.VI.1999, De-cheng Yuan, 200105000, 200105001"; 1 ♀ (ZJUH) "[China:] Guangxi, Longsheng, Huaping, 25-26.VI.1982, Jun-hua He, No. 823513"; 1 ♀ (ZJUH) "[China:] 903839".

Diagnosis.

Face and temple usually with small pale patches, but sometimes entirely absent; mesoscutum very densely to rather sparsely sculptured, as striations of supra-antennal elevations; mesosoma with linear ivory pattern dorsally (at least with large ivory patches on scutellum and metanotum; Fig. 237); posterior half of propodeum coarsely transversely rugose (Fig. 237); vein 1m-cu of fore wing connected to first submarginal cell (Fig. 235); legs mainly black or dark brown (except pale trochanter and trochantellus; Fig. 231); apical half of first tergite partly black, with brownish or ivory apical transverse band (Fig. 239); medially third sternite 0.6-0.7 times as long as second sternite (Fig. 241); fifth and sixth metasomal tergites more or less ivory medio-apically (Fig. 239); comparatively robust species (Fig. 231).

Description.

Holotype, female, length of body 10.2 mm (of fore wing 9.4 mm).

Head. Antenna with 27 segments; frons densely and finely punctate (Fig. 232); vertex and temple smooth and shiny (Fig. 236); head subparallel-sided behind eyes, eye in dorsal view 0.9 times as long as temple (Fig. 233); occipital carina narrowly lamelliform with a weak short carina medio-dorsally (Fig. 233); supra-antennal elevations medium-sized (about 0.4 times as long as scapus), outer side subvertical and obliquely and weakly striate (Fig. 233); clypeus slightly concave and thick medio-ventrally.

Mesosoma. Length of mesosoma 1.6 times its height (Fig. 238); mesopleuron below transverse mesopleural groove somewhat transversely rugulose antero-ventrally and smooth postero-dorsally, above groove rugose anteriorly and smooth posteriorly; transverse mesopleural groove wide, deep and coarsely crenulate; notauli moderately wide, deep and coarsely crenulate; middle lobe of mesoscutum transversely punctate-rugose, lateral lobes mainly irregularly punctate rugose with narrow, smooth mid-longitudinal line (Fig. 237); scutellar sulcus wide, both medially and laterally and coarsely crenulate; scutellum longitudinally rugose, slightly convex and anteriorly near level of mesoscutum; metanotum medially slightly convex, not protruding and largely smooth with sparse fine punctures (Fig. 237); propodeum irregularly rugose anteriorly, transversely and more coarsely rugose posteriorly (Fig. 237); posterior propodeal carina thick lamelliform and slightly arched, foramen medially 0.2 times higher than wide basally.

Wings. Fore wing: length of vein 1-M 2.3 times as long as vein 1-SR (Fig. 235).

Metasoma. First tergite 0.7 times as long as apically wide, smooth and with distinct elliptical depression antero-medially (Fig. 239); second–sixth tergites smooth to superficially coriaceous and shiny (Fig. 239); sternites superficially coriaceous; third sternite about 0.4 times as long as second sternite (Fig. 241); hypopygium triangular in ventral view.

Colour. Black; mandible largely (but teeth orange-brown or black), two patches at inner orbita, clypeus faintly medially, large posterior spot on middle lobe of mesoscutum, broad median longitudinal stripe on scutellum, large median spot on metanotum, small posterior spot and large lateral spots on propodeum, narrow stripe on posterior margin of first metasomal tergite and anterior margin of second tergite, almost entirely fifth and sixth tergites and first and second sternites and antero-latero margin of third sternite, ivory; palpi yellowish brown; basal half of antenna black, medially ivory and dark brown apically (Fig. 234); femur, tibia and tarsus of fore leg and tarsus of hind leg yellowish brown, remainder of legs dark brown to nearly black; pterostigma of fore wing dark brown, remainder of wing membrane subhyaline.

Variation. Length of body 9.0-12.6 mm, of fore wing 7.7-10.8 mm; antenna of ♀ with 27-29 segments; frons without ivory stripes or stripes continuous, clypeus with pair of ivory spots, entirely ivory or black, vertex and outer orbita with ivory spots or stripes; pronotal side with ivory stripe antero-dorsally; propodeum entirely black; antenna medially orange-yellow; legs darker or paler; length of vein 1-M of fore wing 1.2-3.1 times as long as vein 1-SR.

Male. Unknown.

Biology.

Unknown. Collected in June and August at 1500-1760 m.

Distribution.

China (Shaanxi, Guangxi).

Etymology.

Named after the comparatively robust body of this species: from “robustus” (Latin for "hard and strong like an oak").