Cisaris robustus Pham & Cao, 2025

Cisaris robustus Pham & Cao , sp. nov.

( Figures 3 View FIGURE 3 , 4 View FIGURE 4 )

Material examined. Holotype: ♀ (IB), Lam Dong Province, Bidoup-Nui Ba National Park , 12°10’13.15”N 108°41’45.9”E, 1,477 m a.s.l., viii–x.2017, Malaise trap, Pham T.N. leg GoogleMaps .; Paratypes: 1♀ (IB), similar data as holotype GoogleMaps ; 1♀ (IB), Son La Province, Copia Nature Reserve , 21°19’02.2”N 103°35’14.1”E, 1,591 m a.s.l., Malaise trap, Hoang V. T. & Nguyen V.B leg GoogleMaps .; 1♀ (IB), Lang Son Province, Trang Dinh district, Chi Minh commune, 22°21’34”N 106°24’47”E, 350 m a.s.l., 29.iv–5.v.2025, Malaise trap, Pham T.N., Cao T.Q.N., Cao, T.K. T., Dang T.H and Nguyen D.H leg. GoogleMaps

Diagnosis. Antenna without white flagellomeres; scutellum sub-polished, with dense punctures, lateral carina present basally; propodeum with dense, large punctures, area superomedia fused with area basalis; ovipositor sheath 1.0–1.2× as long as hind tibia.

Description of holotype. Face 0.5× as high as wide, densely coarsely punctate ( Fig. 3B View FIGURE 3 ). Clypeal suture distinct. Clypeus 2.7× as wide as high, with dense, large punctures, subbasal part weakly raised, subapical margin impressed ( Fig. 3B View FIGURE 3 ). Mandible long, upper tooth sharp, 3.0× as long as lower tooth. Malar space matt, as wide as basal width of mandible ( Fig. 3B View FIGURE 3 ). Gena wider than compound eye in lateral view, matt, with dense, coarse punctures ( Fig. 3D View FIGURE 3 ). Frons and vertex rugose punctate. Postero-ocellar distance equal to ocular-ocellar distance, 1.3× median ocellus diameter ( Fig. 3C View FIGURE 3 ). Antenna with 17 flagellomeres, thickened toward apex, F1 2.0× as long as wide, 1.0× as long as F2. Occipital carina complete, ventrally curved before meeting hypostomal carina above base of mandible.

Mesosoma. Pronotum rugose punctate. Epomia present ( Fig. 4A View FIGURE 4 ). Mesoscutum 0.7× as long as its maximum width, rugose punctate. Notaulus distinct anteriorly ( Fig. 4B View FIGURE 4 ). Scutellum moderately convex, sub-polished, with dense punctures, lateral carina present basally ( Fig. 4C View FIGURE 4 ). Mesopleuron extremely rough, with dense, irregular wrinkles and coarse punctures; epicnemial carina with upper end reaching to subalar prominence. Sternaulus strong anteriorly, posteriorly weaker, reaching hind margin of mesopleuron, distinctly dorsad of lower posterior corner of mesopleuron. Metapleuron rugose punctate ( Fig. 4A View FIGURE 4 ). Propodeum with dense, large punctures, carinae strong. Area superomedia fused with area basalis. Apico-median portion from posterior margin of area superomedial to apex of posterior corner of area petiolaris strongly concave longitudinally ( Fig. 4D View FIGURE 4 ). Propodeal apophysis strong and compressed. Propodeal spiracle small, round.

Wings. Fore wing length ca. 3.8 mm, vein 1cu-a postfurcal to M&RS, inclivous, postero-distal corner of subbasal cell ca. 70°, vein 3rs-m absent, vein 2rs-m shorter than length of M between 2rs-m and 2m-cu, length of CU between 1m-cu&M and 2cu-a 2.2× length of 2cu-a. Hind wing with distal abscissa of CU present, length of CU between M and cu-a 3.0× length of cu-a.

Legs. Hind coxa densely punctate, except concave area dorsally smooth. Hind femur densely puncto-striate, 3.9× as long as its maximum width, 0.85× as long as hind tibia length. Hind tibia coarsely sculptured, 1.1× as long as hind tarsus. Hind basitarsus 0.4× as long as tarsus.

Metasoma.Tergites smooth and shining, with scattered, small punctures. T1 2.3× as long as apical width, median dorsal carina weak, present medially, dorsolateral carina complete, ventrolateral carina present, weak anteriorly; spiracle small, round. T2 0.9× as long as basal width, 0.6× as long as apical width. Laterotergite of T2 1.6× as long as apical width ( Fig. 4E View FIGURE 4 ). Ovipositor straight. Ovipositor sheath 1.1× as long as hind tibia.

Colour. Black with reddish brown. Head black, scape, pedicel, first eight flagellomeres and mandible reddish, apical flagellomeres reddish brown, palpi yellow. Pronotum with narrow reddish anteriorly. Metasomal tergites from base to apex reddish brown to reddish. Ovipositor reddish. Ovipositor sheath reddish brown. Fore and mid legs reddish, hind leg reddish brown. Wings hyaline, wing veins black.

Variation. Paratypes have fore wing length 3.3–3.6 mm, malar space 0.7–0.8× as long as basal mandible width, T1 2.2–2.7× as long as apical width, laterotergite of T2 1.4–1.7×, ovipositor sheath 1.0–1.2× hind tibia length.

Male. Unknown.

Comparative notes. This species differs from Cisaris carinatus sp. nov. by its scutellum densely punctate with lateral carina present basally. In addition, this new species is larger (fore wing length 3.3–3.8 mm vs. 2.8–3.0 mm). Both new species differ from C. tenuipes by their area superomedia fused with area basalis.

Etymology. The specific name refers to its robust body.

Distribution. Currently known from Lam Dong Province, the Central Highlands, Son La and Lang Son provinces, northern Vietnam.