Streblocera (Streblocera) duplicata Long, 2025

Streblocera (Streblocera) duplicata Long , sp. nov.

Figures 11 View FIGURE 11 , 12 View FIGURE 12 , 21 View FIGURE 21

Type material. Holotype, ♀, labelled “Euph. 392 ”, ( IEBR), NE Vietnam: Lang Son, Huu Lung , Huu Lien NR, forest, MT, 21°38’43’’N 106°21’41’E, 187 m, 15.ii.2024, PQ Mai, TD Duong.

Diagnosis. Small wasp; first flagellomere curved; S.(S.) necurvata sp. nov. shares with S.(S.) curvata Belokobylskij, 2000 , from Nepal, occipital carina complete medio-dorsally, but can be separated from the latter by the following characters: 1) Scapus rather robust, 6.5 × as long as its maximum width (vs scapus slender in S.(S.) necurvata , its length 9.0 × maximum width); 2) Apical width of first tergite 2.6 × its minimum width (vs 2.3 × in S. (S.) necurvata ); and 3) Antenna with 16 antennomeres (vs 17–18 in S.(S.) necurvata ).

Description. Holotype, ♀; body length 1.9 mm, fore wing length 2.1 mm, ovipositor 0.6 mm ( Fig. 11 View FIGURE 11 ).

Head. Antenna with 16 antennomeres; length of scapus 6.5 × its maximum width ( Fig. 12G View FIGURE 12 ); scapus as long as head height; first flagellomere slightly curved, length of first flagellomere 6.0 × its width, and 2.25 × second flagellomere ( Fig. 12G View FIGURE 12 ); in dorsal view, occipital carina nearly complete medio-dorsally ( Fig. 12G View FIGURE 12 ), width of head 1.7 × its median length, and 1.5 × width of mesoscutum (without tegulae); temple roundly narrowed behind eye; length of eye 1.5 × as long as temple; ocelli small, POL: OD: OOL= 3: 2: 7 ( Fig. 12A View FIGURE 12 ); eye 2.25 × as high as broad; in lateral view, transverse diameter of eye 1.1 × length of temple ( Fig. 12C View FIGURE 12 ); in frontal view, diameter of antennal socket 0.8 × between sockets; face width 0.9 × length of face and clypeus combined, and 1.4 × height of eye; clypeus margin straight; malar space as long as basal width of mandible, and 0.4 × as long as eye height ( Fig. 12B View FIGURE 12 ); distance between tentorial pits 1.5 × distance from pit to eye margin; face and clypeus coriaceous; frons flat, largely smooth; temple and vertex polished smooth ( Figs 12A, C View FIGURE 12 ).

Mesosoma. In lateral view, length of mesosoma 1.55 × as long as its height ( Fig. 12E View FIGURE 12 ); notauli narrow, punctate ( Fig. 12D View FIGURE 12 ); prescutellar sulcus wide and deep, 0.8 × as long as scutellum, with one median carina ( Fig. 12D View FIGURE 12 ); mesoscutum and scutellum shiny, smooth; pronotal side largely smooth, sparsely crenulate anteriorly; precoxal short, punctate ( Fig. 12E View FIGURE 12 ); mesopleuron largely smooth; metapleuron sparsely rugose; propodeum with basal short carina and sub-oval areola, two transverse carinae medially, sparsely irregular rugose medio-posteriorly ( Fig. 12F View FIGURE 12 ).

Wings. Length of fore wing 2.6 × its width; length of pterostigma 3.0 × its width, 1.7 × vein 1-R1 ( Fig. 12I View FIGURE 12 ); vein r arising from middle of pterostigma, 0.4 × as long as width of pterostigma, 0.2 × vein 1-R1, and 0.3 × vein 2-SR; vein 1-CU1 short and thick, nearly square, 1-CU1: cu-a: 2-CU1 = 1.5: 3.0: 9.0 ( Fig. 12I View FIGURE 12 ); vein cu-a 0.3 × vein 2-CU1; hind wing: 1-M: 1r-m: 2-SC+R = 2.5: 4.0: 4.0.

Legs. Length of hind femur, tibia and basitarsus 6.5, 8.0 and 7.3 × as long as their maximum width, respectively; hind basitarsus 0.3 × hind tibia, and 0.6 × second-fifth tarsus combined; fourth hind tarsus 0.6 × as long as fifth tarsus (without pretarsus).

Metasoma. Length of first tergite 2.2 × its apical width, apical width of first tergite 2.6 × its minimum width; ovipositor 0.2 × fore wing, and as long as first tergite; first metasomal tergite smooth basally, parallel striate posteriorly ( Fig. 12H View FIGURE 12 ); the rest tergites highly smooth; ovipositor flat, weakly curved upwards.

Colour. Body yellow; eyes silver-grey; antenna yellow; first tergite brownish yellow; wing veins yellow; wing membrane hyaline.

Male. Unknown.

Host: Unknown.

Etymology. Based on similarity to both S.(S.) necurvata sp. nov. and S.(S.) huuliena sp. nov.

Distribution. NE Vietnam: Lang Son province (Huu Lien NR) ( Fig. 21 View FIGURE 21 ).