Trichrysis tridensnotata Rosa, Wei & Xu

Rosa, Paolo, Wei, Na-sen, Feng, Jun & Xu, Zai-fu, 2016, Revision of the genus Trichrysis Lichtenstein, 1876 from China, with description of three new species (Hymenoptera, Chrysididae), Deutsche Entomologische Zeitschrift 63 (1), pp. 109-136: 126-129

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Trichrysis tridensnotata Rosa, Wei & Xu

sp. n.

Taxon classification Animalia Hymenoptera Chrysididae

Trichrysis tridensnotata Rosa, Wei & Xu  sp. n. Figs 76-81, 105

Material examined.

Holotype, ♀: CHINA, Hainan, Yinggeling National Nature Reserve (19°0 ’52’’ N, 109°32 ’47’’ E), 11.V.2005, leg. L-s. Chen (SCAU). Paratype: 1♀, same locality as holotype, 26-27.VIII.2005, leg. L-s. Chen (SCAU).


Trichrysis tridentinotata  sp. n. is close to Trichrysis triacantha  ( Mocsáry, 1889) based on tegula fully metallic blue, pronotal sublateral carina distinct and complete, TFC well developed, appearing double, and T3 prepit bulge distinctly convex. However, it can be separated from Trichrysis triacantha  by: deep concave interval between median tooth and lateral tooth and different shape of S2 black spots (Fig. 105).


Female. Holotype. Body length 7.3 mm.

Head. Scapal basin deep, striate medially with aligned small punctures across striae and punctuate laterally. TFC almost straight. Area beneath TFC raised with punctures elongate longitudinally, TFC appearing double (Fig. 77). Relative length of P:F1:F2:F3 = 1.0:1.6 –1.8:0.7–0.8:0.5– 0.7; F1 l/w = 3.3; OOL = 1.7-2.2 MOD; BOL = 1.6-2.2 MOD; POL = 2.4 MOD; MS = 0.6-1.0 MOD; clypeal apex slightly concave.

Mesosoma. Pronotal groove deep, almost extending to posterior margin of pronotum (Fig. 78); pronotum concave laterally; sublateral carina distinct and complete. Mesoscutellum impunctate antero-medially. Episternal sulcus and scrobal sulcus with large areolate punctures.

Metasoma. T1 and T2 with punctuation geminate and evenly distributed. T2 and T3 with raised median carinae (Fig. 80). T3 prepit bulge distinctly convex; pit row with deep and isolated pits. Apex of T3 with three long and large teeth; interval between median tooth and lateral tooth markedly concave (Fig. 81). S2 black spots small (Fig. 105), fused medially.

Colouration. Head metallic blue, with greenish reflections on face. Mesosoma metallic blue, with greenish-golden reflections on mesopleuron and metapleuron. T1 and T2 metallic blue, with greenish-golden reflections laterally; T3 metallic blue, with greenish-golden reflections laterally and posteriorly. Scape and pedicel metallic bluish-green, flagellum black. Tegula entirely metallic blue. Legs metallic greenish-blue, with fore tarsi blackish-brown.

Male. Unknown.


The paratype of Trichrysis tridensnotata  sp. n. shows some variations in relative length of flagellomeres, OOL, BOL and MS, as given in the description of head.


China (Hainan).


The specific name tridensnotata derives from the Latin adjective tridens (= with three teeth) and the Latin adjective notatus (= evident) and refers to three large teeth on apex of T3.