Jezonogonalos mandibularis Tan & van Achterberg

Tan, Jiang-Li, Achterberg, Cornelis van, Tan, Qing-Qing & Zhao, Lin-Peng, 2017, New species of Trigonalyidae (Hymenoptera) from NW China, ZooKeys 698, pp. 17-58 : 25-29

Jezonogonalos mandibularis Tan & van Achterberg sp. n. Figs 29, 30-38

Type material.

Holotype, ♀ (NWUX) "NW China: Shaanxi, Upper Changqing Re[ser]v[e], Shanshuping, 1556 m, 33.67N 107.58E, 25.viii.-22.ix.2016, Y[ellow Malaise] T[rap], Zhao Lin-Peng, NWUX".

Diagnosis.

Occipital carina very wide medio-dorsally, with pair of curved lamellae (Fig. 35); outer side of supra-antennal elevations subvertical and elevations about 0.6 times as long as scapus (Fig. 35); frons largely coarsely punctate (Fig. 36); supra-antennal elevations largely ivory (Fig. 35); mandible mainly pale brown, except its ivory base and dark teeth (Fig. 36); metasoma dorsally largely smooth, largely black with narrow pale apical bands (Figs 29, 33); first tergite about 0.7 times as long as its apical width (Fig. 33); third sternite about 0.3 times as long as second sternite (Fig. 34). Close to J. satoi (Tsuneki) from Taiwan, from which is differs mainly because of the coarsely and densely punctate frons (sparsely punctulate in J. satoi ), the densely rugose and rather matt scutellum (largely smooth and shiny), clypeus with fine acute tooth medio-ventrally (blunt) and the largely ivory supra-antennal elevations (black).

Description.

Holotype, ♀, length of body 8.5 mm (of fore wing 7.4 mm).

Head. Antenna with 25 segments; frons coarsely punctate (except anteriorly), interspaces narrow and smooth (Figs 35, 36), with rather long setae; vertex largely smooth behind posterior ocelli and posteriorly, but medially punctate and with some short rugae and antero-laterally with oblique rugulae (Fig. 35); temple largely smooth, punctulate, but near mandible punctate (Fig. 37); head gradually narrowed behind eyes, eye in dorsal view 1.4 times as long as temple (Fig. 35); occipital carina strongly widened and pair of circular lamellae medio-dorsally, without distinct carinae (Figs 31, 35); supra-antennal elevations strongly enlarged (about 0.6 times as long as scapus), outer side subvertical and with distinct rugae; clypeus concave and thick medio-ventrally and area above it convex and acutely protruding (Fig. 36).

Mesosoma. Length of mesosoma 1.5 times its height (Fig. 32); mesopleuron antero-dorsally densely reticulate-rugose, dorso-posteriorly with some rugosity and remainder smooth and shiny, and antero-ventrally curved rugulose (Fig. 32); notauli wide, deep and distinctly crenulated; middle lobe of mesoscutum transversely rugose and with finer interconnected sculpture, lateral lobes mainly rugose except for a smooth shallow groove (Fig. 31); scutellar sulcus very wide and coarsely crenulated; scutellum densely reticulate-rugose, convex laterally and shallowly depressed medially, in lateral view far above level of metanotum (Fig. 29); metanotum medially evenly convex and finely rugose (Fig. 31); propodeum antero-laterally irregularly rugose and interspaces more or less coriaceous, matt, remainder coarsely transversely rugose and shiny but smooth posteriorly (Fig. 31); posterior propodeal carina thick lamelliform (foramen about twice as wide as high medially).

Wings. Fore wing: length of vein 1-M 1.7 times as long as vein 1-SR; third submarginal cell much wider anteriorly than second cell (Fig. 30).

Metasoma. First tergite 0.7 times as long as its apical width, smooth but basal depression anteriorly striate (Fig. 33); second and following tergites smooth and shiny; sternites rather densely finely punctate, with wide smooth interspaces; second sternite weakly curved in lateral view; third sternite about 0.3 times as long as second sternite (Fig. 34); hypopygium triangularly protruding in ventral view (Fig. 34).

Colour. Black; inner orbita vaguely partly orange brown; malar space and supra-antennal elevations largely ivory; minute patch of outer orbita, vertex posteriorly, occipital carina medially dark brown; apex of scapus and pedicellus, and mandible largely pale brown but basally ivory and teeth dark brown (Figs 36, 37); tegulae and pronotal lobe below it pale yellowish; first metasomal tergite apically broadly ivory and narrower laterally, first and second sternites with large ivory patch apico-laterally; with narrow ivory apical band at apex of sternites and of second and following tergites (Figs 29, 33); palpi rather dark brown; remainder of antenna blackish; fore leg (except black coxa and trochanter) yellowish brown; middle and hind legs mainly dark brown but coxae black (except ivory apex of hind coxa) and hind trochanter ivory with some faint infuscation; pterostigma brownish yellow, but anteriorly (except basally) and apically blackish; basal half of marginal cell and third submarginal cell dark brown and remainder of wing membrane subhyaline (Fig. 30).

Male. Unknown.

Biology.

Unknown.

Distribution.

China (Shaanxi). Collected at 1556 m.

Etymology.

Named after its conspicuously coloured mandible.