Rhaconotus laevigatus Long

Oanh, Nguyen Thi & Long, Khuat Dang, 2019, New species of the Rhaconotusjacobsoni group (Hymenoptera, Braconidae, Doryctinae) from Vietnam, ZooKeys 853, pp. 37-55 : 37

Rhaconotus laevigatus Long sp. nov. Figs 13, 14-24

Material.

Holotype, female, “Doryc.080” (IEBR), NE Vietnam: Vinh Phuc, Me Linh, Tam Dao foothill, forest, 13.v.2002, KD Long.

Diagnosis.

Occipital carina finely complete medio-dorsally, not fused with hypostomal carina above base of mandible (Fig. 16); frons almost flat, with transverse fine striae (Fig. 14); vertex and temple shiny, smooth; distance from pronotal carina to mesonotum equal to distance from carina to anterior margin of pronotum; in lateral view, metanotum with short pointed tooth; precoxal sulcus narrow, almost smooth (Fig. 18); mesopleuron and metapleuron finely granulate; notauli shallow, sparsely crenulate anteriorly, widened posteriorly, with median more or less shallow depression (Fig. 17); propodeum with median carina in basal 0.6 (Fig. 21); pterostigma 3.3 × as long as wide; fore wing vein 3-SR 3.0 × vein r; vein 1-CU1 0.05 × vein 2-CU1; basal length of second submarginal cell 2.9 × its maximum width and 0.9 × subdiscal cell (Fig. 23); vein 1-M of hind wing 4.2 × vein 1r-m (Fig. 24); inner side of fore tibia with six spines; hind coxa finely and densely granulate; hind tibia 11.1 × its maximum width; first metasomal tergite 2.7 × its apical width, granulo-coriaceous; second tergite with lenticular apical area delineated with furrows (Fig. 19); second-third tergites coarsely longitudinally striate, but finely striate apically; fourth tergite largely striate basally contrast to fine striate apex; fifth tergite striate medially, granulo-punctate apically; sixth tergite fine basally, finely rugose medially, with fine semi-circular striae at apex (Fig. 22).

Description.

Female, body length 7.6 mm; fore wing length 5.7 mm; ovipositor sheath 3.9 mm (Fig. 13).

Head. Antenna incomplete, with 54 segments remaining; scapus length dorsally 1.5 × as long as its maximum width; third antennal segment 1.1 × as long fourth segment; in dorsal view, temple roundly narrowed behind eye; median length of head 2.7 × as long as temple; height of eye 1.6 × as long as temple (Fig. 14); in lateral view, transverse diameter of eye 1.5 × length of temple; eye 1.2 × longer than its width (Fig. 16); ocelli small, basal side of ocellar triangle 1.5 × lateral sides; POL 1.5 × OD, and 0.4 × OOL (Fig. 14); in frontal view, eye twice as high as broad; malar space 0.5 × height of eye, and 1.25 × as long as basal width of mandible; face width 1.1 × height of eye, and 1.4 × height of face and clypeus combined (Fig. 15); hypoclypeal depression as long as distance from edge of depression to eye, 0.5 × as wide as face, and 1.5 × as wide as basal width of mandible; distance between tentorial pits 1.6 × as long as long distance from pit to eye; occipital carina finely complete medio-dorsally, not fused below with hypostomal carina above base of mandible (Fig. 16); head below eyes roundly narrowed below eyes (Fig. 14); length of maxillary palp 1.4 × height of head (without mandible); frons almost flat, with transverse fine striae anteriorly, smooth posteriorly; vertex and temple shiny smooth; face setose, finely punctate (Fig. 15).

Mesosoma. Distance from pronotal carina to mesonotum equal to distance from carina to anterior margin of pronotum; mesoscutum more or less depressed posteriorly; length of mesosoma 2.6 × its height (Fig. 18); in lateral view, metanotum with short pointed tooth; pronotal side deep, almost smooth; mesoscutum granulo-coriaceous; notauli narrow, punctate (Fig. 17); scutellar depression 0.4 × as long as scutellum, with one median carina (Fig. 17); scutellum finely granulate; precoxal sulcus narrow, smooth (Fig. 18); mesopleuron almost smooth; subalar depression wide, deep, with sparse crenulae (Fig. 18); propodeum with carina in its basal 0.6 (Fig. 21).

Wings. Fore wing 4.7 × as long as its maximum width; pterostigma 3.3 × as long as wide; vein r arising behind middle of pterostigma (distance from apex of pterostigma to vein r 0.8 × distance from vein r to base of pterostigma); vein 1-R1 1.1 × as long as pterostigma (Fig. 23); vein 3-SR 3.0 × vein r, 0.2 × vein SR1, and 1.5 × vein 2-SR; vein m-cu distinctly postfurcal; basal length of second submarginal cell of fore wing 4.7 × as long as its maximum width (42: 9), and 0.9 × as long as subdiscal cell; subdiscal cell roundly closed on level of vein m-cu; vein 1-CU1 0.7 × vein cu-a, and 0.05 × vein 2-CU1 (Fig. 23); hind wing 6.1 × as long as wide; vein M+CU 0.2 × vein 1-M; vein 1-M 4.2 × vein 1r-m (Fig. 24).

Legs. Fore tarsus 1.4 × as long as fore tibia; inner side of fore tibia with six spines; outside of fore tibia with long erected setae, length of seta twice as long width of fore tibia; hind coxa with baso-ventral tooth; hind femur, tibia and basitarsus 5.6, 11.1 and 8.0 × their maximum width, respectively; dorsal side of hind femur with long semi-erected setae, length of seta 1.6 × as long as maximum width of hind tibia (Fig. 20); outside of hind tibia with long erected setae, length of seta twice as long as maximum width of hind tibia; inner hind tibial spur 0.3 × as long as hind basitarsus; hind tarsus 1.2 × as long as hind tibia; basitarsus 0.8 × as long as second-fifth tarsal segments combined; second tarsus 0.4 × as long as basitarsus, and 1.4 × as long as fifth tarsus (without pretarsus); fourth tarsus 0.6 × fifth tarsus; hind coxa with sparse setae, finely granulate.

Metasoma. Metasoma 1.5 × as long as head and mesosoma combined; maximum width of first tergite 1.5 × its minimum width; length of first metasomal tergite 2.7 × apical width, and 1.7 × length of propodeum; second tergite with lenticular apical area separated with distinct wide crenulate furrow (Fig. 19); length of separated area 0.75 × length of second tergite, and 0.9 × third tergite; length of second tergite 0.6 × as long as its basal width, and 1.2 × length of third tergite; first metasomal tergite with long straightly erected setae laterally, with two almost parallel dorsal carina running from base to apex (Fig. 19); first tergite almost granulo-coriaceous; second tergite coarsely striate; third-fourth tergites largely striate basally, finely striate apically (Fig. 19); fifth tergite striate basally, granulo-punctate apically; sixth tergite setose, finely striate basally, finely rugose medially, with fine semi-circular striae apically (Fig. 22);

Colour. Black, antenna brown; palpi brown; all legs dark brown to black, expect tarsus yellowish brown; tegula brown; wing veins brown; pterostigma brown, cream white basally, surrounding vein r beneath pterostigma smoky brown (Fig. 23); ovipositor sheath brown.

Male.

Unknown.

Biology.

Unknown.

Etymology.

From laevis (Latin for smooth, polished), because of vertex, temple and mesopleuron shiny smooth.