Cisaris carinatus, Pham & Cao, 2025

Cisaris carinatus sp. nov.

( Figures 1 View FIGURE 1 , 2 View FIGURE 2 )

Material examined. Holotype: ♀ (IB), Son La Province, Copia Nature Reserve , 21°19’41.1”N 103°35’29.22”E, 1,519 m a.s.l., 27.iv–2.v.2016, Malaise trap, Hoang V. T. & Nguyen V.B leg GoogleMaps . Paratypes: 2♀ (IB), similar data as holotype, except 21°19’02.2”N 103°35’14.1”E, 1,591 m a.s.l. GoogleMaps

Diagnosis. Antenna without white flagellomeres; scutellum smooth, with sparse punctures, lateral carina long and weak; propodeum with dense, large punctures, area superomedia fused with area basalis; ovipositor sheath 1.2–1.3× as long as hind tibia.

Description of holotype. Face 0.5× as high as wide, densely coarsely punctate ( Fig. 1B View FIGURE 1 ). Clypeal suture distinct. Clypeus 2.5× as wide as high, basally sub-polished, with large punctures, subapical margin impressed ( Fig. 1B View FIGURE 1 ). Mandible long, upper tooth sharp, 2.0× as long as lower tooth. Malar space matt, as wide as basal width of mandible ( Fig. 1B View FIGURE 1 ). Gena wider than compound eye in lateral view, with dense punctures ( Fig. 1D View FIGURE 1 ). Frons and vertex rugose punctate. Postero-ocellar distance 0.9× ocular-ocellar distance, 1.4× median ocellus diameter ( Fig. 1C View FIGURE 1 ). 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. 2A View FIGURE 2 ). Mesoscutum 0.8× as long as its maximum width, rugose punctate. Notaulus distinct anteriorly ( Fig. 2B View FIGURE 2 ). Scutellum moderately convex, sub-polished, with sparse punctures, lateral carina weak and extending nearly to apex ( Fig. 2C View FIGURE 2 ). 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 reticulate rugose ( Fig. 2A View FIGURE 2 ). Propodeum with dense, large punctures, carinae distinct. 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. 2D View FIGURE 2 ). Propodeal apophysis strong and compressed. Propodeal spiracle small, round.

Wings. Fore wing length ca. 2.8 mm, vein 1cu-a postfurcal to M&RS, inclivous, postero-distal corner of subbasal cell ca. 60°, 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 2.4× length of 2cu-a. Hind wing with distal abscissa of CU present, length of CU between M and cu-a 4.0× length of cu-a.

Legs. Hind coxa largely punctate, except concave area dorsally smooth. Hind femur densely puncto-striate, 3.7× as long as its maximum width, 0.9× 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 2.6× as long as apical width, median dorsal carina weak, present medially, dorsolateral carina complete, ventrolateral carina present, weak anteriorly; spiracle small, round. T2 1.1× as long as basal width, 0.6× as long as apical width ( Fig. 2E View FIGURE 2 ). Laterotergite of T2 1.7× as long as apical width. Ovipositor straight. Ovipositor sheath 1.2× as long as hind tibia.

Colour. Black with reddish brown. Head black, scape, pedicel, first eight flagellomeres and mandible reddish, apical flagellomeres dark brown, palpi yellow. Metasomal tergites from base to apex reddish brown to reddish. Ovipositor reddish. Ovipositor sheath brown. Legs reddish, except hind femur reddish brown. Wings hyaline, wing veins dark brown.

Variation. Paratypes have fore wing length 2.8–3.0 mm, T1 2.6–2.7× as long as apical width, T2 0.6–0.7× apical width, ovipositor sheath 1.2–1.3× hind tibia length .

Male. Unknown.

Comparative notes. This species differs from other Cisaris species by having lateral carina of scutellum weak but extending nearly to apex.

Etymology. The specific name refers to the long lateral carina of scutellum.

Distribution. Currently known only from Son La Province, northwestern Vietnam.