Tropidodynerus (Tropidodynerus) concavus Li & Chen, 2015

Li, Ting-jing & Chen, Bin, 2015, Two new species of the newly recorded subgenus Tropidodynerus Bluethgen (Hymenoptera, Vespidae, Eumeninae) from China, with a key to the known species, Journal of Hymenoptera Research 43, pp. 9-18 : 12-15

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Tropidodynerus (Tropidodynerus) concavus Li & Chen

sp. n

Tropidodynerus (Tropidodynerus) concavus Li & Chen sp. n Figs 10-17 View Figures 10–17

Material examined.

Holotype, ♂, China, Hebei Province, Zhangjiakou City, Zhuolu County, Yangjiaping Forest, 39°58'22.28"N, 115°23'36.38"E, 908m, 6-10.VII.2004, unspecified collector, No. 1004048 (HBU).


Male (Figs 10-16 View Figures 10–17 ): Body length 7.5 mm, forewing length 7.0 mm. Black, with yellow and ferruginous markings. Yellow markings as follows: entirely clypeus, mandible except apex, labrum, a band along inner orbits on the lower side of eye (Fig. 11 View Figures 10–17 ), ventral surfaces of antennal scape and pedicel, a large transverse interantennal spot, a small postocular spot (Fig. 12 View Figures 10–17 ), a broad band on dorsal surface of pronotum (Fig. 10 View Figures 10–17 ), tegula, a large spot at the upper part of mesepisternum, metanotum, ventral surface of mid coxa, a apical broad band on each of T1-T5 (Fig. 10 View Figures 10–17 ) and S2, a apical broad interrupted band on S3, and a long transverse spot on lateral side of S4 (Fig. 16 View Figures 10–17 ); ventral surfaces of A3-A10, whole A11-12, apex of parategula, and apexes of all femora to apical tarsi yellow brown; mid and hind femora except apexes largely ferruginous; Wings slightly brownish.

Head. In front view, head much wider than long, width 1.25 × length; clypeus with sparsely irregular punctures (Fig. 11 View Figures 10–17 ) and distinctly convex, its apex deeply emarginated and U-shaped, width of clypeus 1.18 × length, apical width: depth of emargination = 1.5: 1.36, width of clypeus: apical width = 4.5: 1.27; antenna (Fig. 14 View Figures 10–17 ), apical segments coiled; interantennal space slightly convex, with median carina; frons with moderately thick punctures and reticulate; POD: OOD = 20: 22; the diameter of anterior ocellus somewhat smaller than the distance between anterior and posterior ocella; punctures on vertex sparser than those on frons.

Mesosoma. Anterior face of pronotum coriaceous and with minute punctures, pronotal carina complete at the middle and its shoulder, stopping abruptly below shoulder, and its lateral face well developed, somewhat bending, and not joining the carina of shoulder; punctures on pronotum sparser than those on other parts of mesosoma, the distances between punctures almost equal to the diameter, punctures on lateral side of pronotum comparatively denser and stronger; mesoscutum, mesopleuron, and scutellum strongly punctured, punctures distinctly dense and mostly so connected as to forming reticulate striations (Fig. 17 View Figures 10–17 ); scutellum somewhat convex; metanotum smooth, with sparse punctures and inclined; epicnemial carina of mesopleuron absent on the upper half, present and strong on the lower half; propodeum impunctate, dorsal surface not convex and wholly with dense oblique rugae, vertical median area concave, somewhat deep, and with a median carina; the whole vertical and lateral sides of pro podeum with densely thin, long and transverse rugae; posterior lobe of tegula rounded at the apex; apex of parategula reaching far beyond the apex of tegula (Fig. 15 View Figures 10–17 ); mid coxa concave ventrally (Fig. 13 View Figures 10–17 ).

Metasoma (Fig. 16 View Figures 10–17 ). In dorsal view, T1 domed, width 2.16 × length and 0.76 × width of T2; T1 and T2 without apical lamellae; S1 coriaceous, posterior area with faint transverse rugae, lateral carina obsolete; punctures on metasoma distinctly minuter and denser than those on other parts of the body; punctures on T1 somewhat bigger and sparser than those on other terga, with interspaces in average as long as the diameter of the punctures; punctures on T2 denser than those on S2, and visible part of T3-T7 and S3-S7 somewhat weaker.

Female. Unknown.


The species resembles Tropidodynerus flavus (Lepeletier, 1841) in metanotum yellow, propodeum without a sharp edge at the transition of dorsal surface to lateral side, and apical bands on T2 and T3 not interrupted. It differs from Tropidodynerus flavus and all other members of the genus by the following character combination: total width of clypeus: apical width = 4.5: 1.27, apical width: depth of apical concavity =1.5: 1.36, scutellum black, and mid coxa concave ventrally.


China (Hebei).


The specific name is the Latin adjective concavus, with reference to mid coxa concave ventrally in male.