Taeniogonalos triangulata, 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 : 120-122

Taeniogonalos triangulata sp. n. Figs 549-559

Type material.

Holotype, ♀ (ZJUH) "[China:] Yunnan, Kunming, reared from Diprionidae ( Hymenoptera ), 15.VIII.1978, Jing-liang Qi, 803127". Paratypes: 1 ♀ + 2 ♂ (ZJUH) "[China:] Yunnan, Kunming, reared from Diprionidae ( Hymenoptera ), 12.IX.1979, Jing-liang Qi, 803128"; 3 ♀ + 1 ♂ (ZJUH, RMNH) "[China:] Yunnan, Xiangyun, reared from Diprionidae ( Hymenoptera ), 12.VIII.1980, Hai-lin Wang, 888667, 888665, 888666; id., but VIII.1981, 840755".

Diagnosis.

Supra-antennal elevations 0.5-0.7 times as long as scapus and outer side of elevations often subvertical, densely punctate, dull and apically black (Fig. 551); tyloids of male antenna linear; occipital carina smooth medio-dorsally (Fig. 551); third submarginal cell of fore wing 0.6-0.7 times as long as second submarginal cell (Fig. 553); first discal cell of fore wing comparatively elongate (Fig. 553); metasoma coarsely punctate (Fig. 557), with wide orange-brown band at apex of second tergite and sternite and remainder black (Fig. 557); first tergite about half as long as its apical width; second sternite of female triangularly protruding medio-apically and in lateral view acute apically (Fig. 558; but of male flat or slightly convex); third sternite 0.3-0.4 times as long as second sternite.

Description.

Holotype, female, length of body 8.8 mm (of fore wing 7.1 mm).

Head. Antenna with 24 segments; frons, vertex and temple coarsely reticulate-punctate (Figs 550, 551); head gradually narrowed behind eyes, eye in dorsal view 0.8 times as long as temple (Fig. 551); occipital carina moderately widened and lamelliform, weakly crenulate medio-dorsally; supra-antennal elevations strongly enlarged (about 0.7 times as long as scapus), outer side subvertical and distinctly densely punctate; clypeus slightly concave and thick medio-ventrally.

Mesosoma. Length of mesosoma 1.6 times its height (Fig. 556); mesopleuron coarsely irregular rugose dorsally, coarsely reticulate-punctate ventrally; transverse mesopleural groove moderately wide, deep and coarsely crenulate; notauli moderately wide, deep and coarsely crenulate; mesoscutum coarsely reticulate-punctate (Fig. 555); scutellar sulcus wide, both medially and laterally and coarsely crenulate; scutellum coarsely reticulate-punctate, slightly convex and anteriorly near level of mesoscutum; metanotum medially slightly convex, not protruding and reticulate-punctate (Fig. 555); propodeum coarsely reticulate-rugose (Fig. 555); posterior propodeal carina thick lamelliform and slightly arched, foramen medially 0.8 times higher than wide basally.

Wings. Fore wing: length of vein 1-M 1.4 times as long as vein 1-SR (Fig. 553).

Metasoma. First tergite 0.7 times as long as apically wide, smooth and with distinct elliptical depression medially (Fig. 557); second–sixth tergites densely and coarsely reticulate-punctate (Fig. 557); sternites densely and coarsely punctate; second sternite distinctly convex, without medio-apical protuberance (Fig. 559); third sternite about 0.3 times as long as second sternite, with medio-apical protuberance triangularly protruding (Fig. 559); hypopygium triangular in ventral view (Fig. 559).

Colour. Black; metasoma largely black with wide orange-brown band at apex of second tergite and sternite; mandible nearly black, somewhat brownish; antenna dark brown to black, becoming darker apically; tibiae and tarsi yellowish brown, remainder of legs dark brown to nearly black; pterostigma and anterior half of fore wing dark brown, remainder of wing membrane subhyaline.

Variation. Length of body 8.8-10.1 mm, of fore wing 7.1-8.2 mm; length of vein 1-M of fore wing 1.4-1.6 times as long as vein 1-SR.

Male. Length of body 8.2-9.7 mm, of fore wing 6.8-7.9 mm; antenna with 23 segments, tyloids linear, 0.8 times as long as segment on 10 th– 14th segments and 0.5 times as long as segment on 15th segment; genitalia extruded.

Biology.

Reared from Diprionidae , probably hyperparasitoid of (Ichneumonoid or Tachinid) endoparasitoid. Collected in August–September.

Distribution.

China (Yunnan).

Etymology.

Named after the triangular medio-apical protuberance of the third sternite: “triangulus” is Latin for "having three angles".