Symmorphus (Symmorphus) nigriclypeus Li & Chen

Li, Ting-jing & Chen, Bin, 2014, The taxonomic accounts of the genus Symmorphus Wesmael (Hymenoptera, Vespidae, Eumeninae) from China, with descriptions of three new species, ZooKeys 389, pp. 9-26 : 14-16

Symmorphus (Symmorphus) nigriclypeus Li & Chen sp. n. Figs 17-21

Material examined.

Holotype. ♂, China, Tibet, Nyingchi, Medog County, 29°71'N, 95°63'E, 3026 m, 13.VII.2013, Yong Zhou, No. 1004038 (CQNU).

Description.

Male (Fig. 17): body length 7.0 mm, forewing length 9.0 mm. Black; apical margin of T1 orange-red, subapical margin of both T2 and S2 orange-yellow. Wings lightly infuscate. Hairs white, mesosoma with sparse lengthened hairs, in addition to short pubescence.

Head. Clypeus moderately punctate-puncticulate, clypeal apex deeply emarginated and with acute apical toothed laterally (Fig. 18). Frons punctate-puncticulate to foveolate-puncticulate, major punctures closely spaced; vertex punctate-puncticulate and barely foveolate-puncticulate, minor punctures closely spaced; interantennal carina prominent; male antennal segments 10-13 with tyloids, segment 13 length/width=1.43 (Fig. 19).

Mesosoma. Pronotum, except anterior face, punctate-puncticulate to foveolate-puncticulate, major punctures widely spaced, more or less costate laterally, minor punctures evenly and closely spaced; anterior face obscurely imbricate; pronotal carina complete; humeral angle moderately projected. Mesoscutum punctate-puncticulate to foveolate-puncticulate, primarily punctate-puncticulate, minor punctures evenly and densely spaced, major punctures great widely spaced; notaulus complete and distinctly deep (Fig. 20); pseudosternum anterior margin without high reflexed margin. Mesoscutellum similar to mesoscutum. Dorsal mesepisternum sparsely punctate-puncticulate to foveolate-puncticulate, major punctures very widely spaced, shallow and indistinct, minor punctures obscure; ventral mesepisternum foveolate-puncticulate, major punctures widely spaced, minor punctures obscure. Mesepimeron striately rugose. Metanotum nearly vertical, dorsal surface narrow, foveolate-puncticulate dorsally, striately rugose ventrally. Propodeum striately rugose laterally, areolate-rugose dorsally; posterior face obscure striately rugose, propodeal superior shelf length 3.1 timestrans-scutal sulcus, propodeal orifice broadly and rounded, propodeal submedian carina complete and sharply defined throughout; propodeal valvula short posteriorly, fused distally to submarginal carina.

Metasoma. Metasomal tergum 1 with postcarinal area foveolate-puncticulate, postcarinal length/apical width=0.71, carinal width/apical width=0.85, postcarinal sides slightly convergent toward base, transverse carina complete, longitudinal furrow broadly depressed, with deeper narrow medial sulcus; apical margin indistinctly depressed (Fig. 21); S1 rugose anteriorly, basal carina deeply curved posteriorly, fused to lateral oblique ridges, median longitudinal ridge strongly prominent and flanked by longitudinal carinate rugae; segment 2 punctate-puncticulate, minor punctures connected by obscure imbricate subsculpture; T3-5 sparsely foveolate-puncticulate, major punctures subapically. Segments 3-6 with imbricate subsculpture.

Female. Unknown.

Remarks.

This species is easily distinguished from all other species of Symmorphus by the combination of the following characters: body black, except apical margin of T1, and subapical margins of both T2 and S2 (Fig. 17); clypeal apex deeply emarginated and with acute apical toothed laterally (Fig. 18).

Distribution.

China (Tibet).

Etymology.

The specific name nigriclypeus is the Latin nigr (= black) + clypeus (=clypeus), which refers to the clypeus in male of the species black.