Cisaris rugosus Pham & Cao, 2025

Cisaris rugosus Pham & Cao , sp. nov.

( Figures 5 View FIGURE 5 , 6 View FIGURE 6 )

Material examined. Holotype: ♀ ( IEBR), Lao Cai Province, Hoang Lien National Park, 27.ix.2013, hand net, Pham T.N. leg.

Diagnosis. Antenna without white flagellomeres; scutellum sub-polished, with moderately dense punctures, lateral carina present basally; propodeum punctate to rugose, area superomedia separated from area basalis, area dentipara densely wrinkled; metasomal tergites 2 and 3 enlarged, almost fused together dorsally, following tergites mostly retracted under tergite 3; ovipositor sheath 1.3× as long as hind tibia.

Description of holotype. Face 0.5× as high as wide, rugose punctate ( Fig. 5B View FIGURE 5 ). Clypeal suture distinct. Clypeus 2.9× as wide as high, with large punctures, subapical margin impressed ( Fig. 5B View FIGURE 5 ). Mandible long, upper tooth sharp, 2.0× as long as lower tooth. Malar space matt, densely punctate, as wide as basal width of mandible ( Fig. 5B View FIGURE 5 ). Gena wider than compound eye in lateral view, sub-polished, with moderately dense punctures ( Fig. 5D View FIGURE 5 ). Frons and vertex rugose punctate. Postero-ocellar distance 0.7× as long as ocular-ocellar distance, 1.7× median ocellus diameter ( Fig. 5C View FIGURE 5 ). 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, except narrow impunctate area sub-dorsally. Epomia present ( Fig. 6A View FIGURE 6 ). Mesoscutum 0.85× as long as its maximum width, sub-polished, with dense punctures laterally and rugose punctate medio-posteriorly. Notaulus distinct anteriorly. Scutellum moderately convex, sub-polished, with sparse punctures, lateral carina present basally ( Fig. 6B View FIGURE 6 ). Mesopleuron extremely rough, with dense, irregular wrinkles and rugose 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. 6A View FIGURE 6 ). Propodeum with carinae strong. Area superomedia sub-polished with irregular wrinkles laterally. Area basalis with moderately dense punctures. Area dentipara densely wrinkled. Apico-median portion from posterior margin of area superomedial to apex of posterior corner of area petiolaris strongly concave longitudinally ( Fig. 6D View FIGURE 6 ). Propodeal apophysis strong and compressed. Propodeal spiracle small, round.

Wings. Fore wing length ca. 4.7 mm, vein 1cu-a postfurcal to M&RS, inclivous, ventrally curved, 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 3.0× length of 2cu-a. Hind wing with distal abscissa of CU present, length of CU between M and cu-a 1.7× length of cu-a.

Legs. Hind coxa densely coarsely punctate, except concave area dorsally smooth. Hind femur sub-polished with dense punctures, 4.0× as long as its maximum width, 0.8× as long as hind tibia length. Hind tibia coarsely sculptured, slightly longer than hind tarsus. Hind basitarsus 0.45× as long as tarsus.

Metasoma.Tergites smooth and shining, with scattered, small punctures. T1 3.0× as long as apical width, median dorsal carina weak, present medially, dorsolateral carina complete, ventrolateral carina present, weak anteriorly; spiracle small, round. T2 and T3 enlarged, almost fused together dorsally ( Figs 6C, E View FIGURE 6 ). Laterotergite of T2 2.3× as long as apical width ( Fig. 6C View FIGURE 6 ). T4 onwards mostly retracted under tergite 3 ( Fig. 6C View FIGURE 6 ). Ovipositor straight. Ovipositor sheath 1.3× as long as hind tibia.

Colour. Black with reddish brown. Head black, antenna reddish to reddish brown, mandible reddish, palpi yellow. Metasomal tergite 1 black, tergites 2 and 3 reddish brown. Ovipositor reddish. Ovipositor sheath reddish brown. Legs reddish brown. Wings hyaline, wing veins blackish brown.

Male. Unknown.

Comparative notes. This species differs from its congeners by having its T2 and T3 enlarged, almost fused dorsally, T4 onwards mostly retracted under tergite 3 and densely wrinkled area dentipara.

Etymology. The specific name refers to its densely wrinkled area dentipara.

Distribution. Currently known from Lao Cai Province, northwest Vietnam.