Trichrysis raymundi Wiśniowski, 2020

Wiśniowski, Bogdan, Lien, Nguyen Thi Phuong & Cuong, Nguyen Quang, 2020, Discovery of four new species of Trichrysis Lichtenstein, cyanea species group (Hymenoptera, Chrysididae) from Vietnam, Zootaxa 4881 (1), pp. 165-178 : 174-177

Trichrysis raymundi Wiśniowski , sp. nov.

Material examined. Holotype, ♀: / VIET NAM; Gia Lai, KBang,/ Kon Chu Rang NR; 8.ix.2018;/ [leg.] LVT, TXL, NTPL /

Diagnosis. Middle sized species with robust, densely punctate body and very distinctive set of morphological features: mandible with subapical tooth ( Fig. 22 ), malar space long, 2.2 × MOD ( Fig. 20 ), black spot on S2 nearly cordiform ( Fig. 23 ), T3 prepit bulge very distinct in lateral view ( Fig. 25 ). Sublateral, longitudinal carina on pronotum developed only in anterior half, absent posteriorly. Tegula purple-violet, metallic. T1 and T2 green dorsally, golden-green laterally. T1 with distinct median groove anteriorly; T2 and T3 with distinct median carina. Pits large; apex of T3 with three long and sharp teeth ( Fig. 26 ); median tooth distinctly curved downwards.

Description. Female. Holotype. Body length 7.1 mm.

Head. Brow prominent, TFC short, single, and almost straight, with polished margin ( Fig. 20 ). Frons slightly raised between TFC and scapal basin. Scapal basin concave, moderately deep, striate medially and punctate laterally, with white pubescence. Brow above TFC flattened, with dense punctures. BOL 1.6 × MOD. Clypeus incised medially, with black margin, in lateral view conical. Mandible with subapical tooth, bidentate ( Fig. 22 ). Malar space 2.2 × MOD, base of mandible with pit, genal carina reaching up to 3/4 of height of head. Relative length of P:F1: F2:F3=1.0:1.4:0.8:0.7: F1 l/w=2.7; OOL 1.5 × MOD; POL 2.0 × MOD. Erect setae on vertex yellowish, some of them longer than MOD. Ocellar triangle obtuse, densely punctured and punctures with greenish interspaces, 0.2–1.0 × PD ( Fig. 21 ).

Mesosoma. Median pronotal line short and shallow; sublateral, longitudinal carina on pronotum developed only in anterior half, absent posteriorly. Tegula purple-violet, metallic. Punctuation dense, consisting of punctures of variable size; interspaces between puncture shining and punctate, 0.2–1.0 × PD. Mesepisternum with large punc-tures, interspaces wrinkled 0.1–0.6 × PD. Episternal sulcus with large elongate punctures, scrobal sulcus with large areolate punctures, about 2.0 × as large as punctures on mesepisternum ( Fig. 24 ). Setae on outer edge of metatibia short, not longer than ½ × their distal width.

Metasoma. Metasoma with dense punctures and shining interspaces; T1 with median anterior groove well de-veloped. T2 with distinct, polished median carina; T3 medially with transverse depression, interrupted by median carina ( Fig. 26 ), prepit bulge very distinct in lateral view ( Fig. 25 ) sloping toward pit row. Pits large, clearly separated, their margins with blue shimmer. Apical teeth long, median tooth pointed and downcurved, with longitudinal carina, lateral teeth flattened, rounded apically ( Figs 25–26 ). Interval between median tooth and lateral teeth deeply incurved ( Fig. 26 ). Black spots on S2 subtriangular, fused medially, elongated longitudinally, anteriorly with golden triangular incision, almost cordiform ( Fig. 23 ).

Colouration. Scapal basin golden, scapus, pedicel, F1 green, F2 distinctly green, rest of flagellum black. Body metallic golden green. Some parts on body with blue hints: notauli, pronotum anteriorly, pleura, pits. Tegula purpleviolet, metallic. Wings slightly amber. T1 and T2 green dorsally, golden-green laterally. T3 golden green except blue purple transversal depression. Sternites and legs golden green; tarsi dark brown.

Male. Unknown.

Distribution. Central Highlands of Vietnam (Gia Lai Province).

Remarks. Trichrysis raymundi sp. nov. is very characteristic and easy to distinguish from other species of Trichrysis in the region after following features: mandibles with subapical tooth, bidentate, malar space long, 2.2 × MOD, nearly cordiform black spot on S2, very distinct prepit bulge on T3, T2 and T3 with distinct median carina, and apex of T3 with three long and sharp teeth.

Etymology. The specific name is dedicated to my friend, Rajmund Karolczuk Bowman, who was my frequent companion during field trips.

Figures

FIGURES 19–22. Trichrysis raymundi sp. nov., holotype ♀. 19. Habitus, lateral view. 20. Head, frontal view. 21. Head, dorsal view. 22. Mandibles, frontal view. Scale bar = 0.5 mm.

FIGURES 23–26. Trichrysis raymundi sp. nov., holotype ♀. 23. S2, ventral view. 24. Head and mesosoma, lateral view. 25. T3, lateral view. 26. T3, dorsal view. Scale bar = 0.5 mm.