Rhaconotus simulatus 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 simulatus Long sp. nov. Figs 37, 38-49

Material.

Holotype, female, “Doryc.791” (IEBR), NW Vietnam: Son La, orchard, MT, 21°18'03.6"N 103°55'38.3"E, 671 m, 15-25.vi.2016, KD Long.

Diagnosis.

Occipital carina finely complete medio-dorsally, fused with hypostomal carina above base of mandible (Fig. 40); frons slightly depressed medially, rugose anteriorly, finely granulate posteriorly; vertex and temple 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 long, sinuate, crenulate (Fig. 42); mesopleuron finely granulate; notauli narrow, widened anteriorly, crenulate with two posterior convergent carinae running close to scutellar sulcus (Fig. 41); propodeum with median carina in basal 0.5; pterostigma 5.7 × as long as wide; fore wing vein 3-SR 3.4 × vein r; vein 1-CU1 0.08 × vein 2-CU1 (Fig. 46); basal length of second submarginal cell 3.8 × its maximum width and as long as subdiscal cell; vein 1-M of hind wing 4.4 × vein 1r-m (Fig. 47); inner side of fore tibia with five spines; hind coxa finely granulate; hind tibia 8.3 × its maximum width; first metasomal tergite 2.2 × its apical width (Fig. 43), longitudinally striate in apical 0.7; furrow between second and third tergites wide, crenulate; third tergite largely striate basally, densely and finely striate apically; fourth-fifth tergites longitudinally striate; sixth tergite striate basally, with fine semi-circular striae at apex (Fig. 45).

Description.

Female, body length 6.6 mm; fore wing length 5.0 mm; ovipositor sheath 2.4 mm (Fig. 37).

Head. Antenna incomplete, with 30 segments remaining; scapus length dorsally 1.7 × its maximum width; third antennal segment 1.3 × as long fourth segment; in dorsal view, temple roundly narrowed behind eye; head width 1.3 × its median length (Fig. 38); median length of head 3.2 × as long as temple; height of eye 1.09 × temple; in lateral view, eye 1.3 × longer than width; transverse diameter of eye 1.6 × length of temple (Fig. 40); ocelli small, basal side of ocellar triangle 1.5 × lateral sides; POL as long as OD, and 0.5 times OOL; in frontal view, eye 2.1 × as high as broad (Fig. 39); malar space height 0.5 × height of eye, and as long as basal width of mandible; face width 1.2 × height of eye, and 1.3 × height of face and clypeus combined (Fig. 39); hypoclypeal depression width 0.6 × as long distance from edge of depression to eye, 0.4 × as wide as face; and 1.2 × as wide as basal width of mandible; distance between tentorial pits as long as long distance from pit to eye; occipital carina complete medio-dorsally, fused bellow with hypostomal carina distal to base of mandible (Fig. 40); maxillary palp 1.3 × height of head (without mandible); frons slightly depressed medially, rugose anteriorly, granulo-coriaceous posteriorly; vertex between lateral ocellus and eye margin finely granulate, vertex between lateral ocellus and eye margin finely granulate; vertex below posterior ocelli, temple smooth; face latero-ventrally and malar space coriaceous; clypeus rugose.

Mesosoma. Length of mesosoma 2.4 × its height (Fig. 42); in lateral view, metanotum with short pointed tooth; notauli narrow, widened anteriorly, crenulate with two posterior convergent carinae running close to scutellar sulcus (Fig. 41); scutellar sulcus with three carinae, 0.4 × as long as scutellum (Fig. 41); scutellum mesoscutum and scutellum finely granulate; pronotal side depressed medially, sparsely crenulate medially and anteriorly, coarsely rugose posteriorly, granulate ventrally; precoxal sulcus long, sinuate, crenulate (Fig. 42); mesopleuron finely granulate; subalar depression largely crenulate; propodeum with baso-lateral areas emarginated by carinae (Fig. 44); median carina in basal 0.5 of propodeum; baso-lateral areas finely granulate; propodeum coarsely rugose apically.

Wings. Fore wing 4.2 × as long as its maximum width; pterostigma 5.7 × as long as wide; vein r arising from middle of pterostigma; vein 1-R1 1.4 × as long as pterostigma; vein 3-SR 3.4 × vein r, 0.45 × vein SR1, and 2.0 × vein 2-SR; vein m-cu distinctly postfurcal; second submarginal cell parallel-sided, basal length 3.8 × as long as its maximum width, and as long as subdiscal cell (Fig. 46); subdiscal cell roundly closed on level of vein m-cu; vein 1-CU1 0.08 × vein 2-CU1, and 0.75 × vein cu-a; hind wing 7.0 × as long as wide; vein M+CU 0.3 × vein 1-M; vein 1-M 4.4 × vein 1r-m (Fig. 47).

Legs. Fore tarsus 1.6 × as long as fore tibia; inner side of fore tibia with five spines; hind coxa with baso-ventral tooth; hind coxa finely granulate; hind femur, tibia and basitarsus 3.0, 8.3 and 5.75 × their maximum width, respectively (Figs 48, 49); hind femur finely granulate; hind tibia with long semi-erected setae, length of seta as long as maximum width of tibia (Fig. 49); inner hind tibial spur 0.3 × as long as hind basitarsus; hind tarsus 0.8 × as long as hind tibia; basitarsus 0.7 × as long as second-fifth tarsal segments combined; second tarsus 0.4 × basitarsus, and as long as fifth tarsus (without pretarsus); fourth tarsus 0.2 × fifth tarsus.

Metasoma. Metasoma 1.25 × as long as head and mesosoma combined; first metasomal tergite distinctly widened at apex, with two dorsal carinae in whole length of tergite (Fig. 43); maximum width of first tergite 1.2 × its minimum width; length of first metasomal tergite 2.2 × apical width (Fig. 43), and 1.4 × length of propodeum; second tergite with more or less distinct lenticular apical area separated by furrows (Fig. 43); length of second tergite 0.44 × as long as its basal width, and 0.5 × length of third tergite; first metasomal tergite longitudinally striate in apical 0.7 of tergite (Fig. 43); furrow between second and third tergites wide, crenulate; third tergite largely striate basally, densely and finely striate apically; fourth-fifth tergites longitudinally striate (Fig. 43); sixth tergite striate basally, with fine semi-circular striae apically (Fig. 45);

Colour. Body black; antenna pale brown; palpi brown, except apical segment of maxillary palp pale yellow; fore coxa brownish yellow, fore femur and tibia yellowish brown; fore tarsus yellow; middle coxa yellowish brown; middle femur and tibia brown; middle tarsus yellow; hind leg brown, except tarsus brownish yellow; tegula brown; wing veins brown; pterostigma brown, cream white basally (Fig. 46); wing membrane yellow with brown clouds medially; ovipositor sheath brown.

Male.

Unknown.

Biology.

Unknown.

Etymology.

From simulo (Latin for imitate, copy), because this new species is similar to R. thayi Belokobylskij.

Remarks.

R. simulatus , sp. nov. is similar to R. thayi Belokobylskij, 2001, from China and Vietnam, but the new species differs from the later by having: a. Occipital carina fused bellow with hypostomal carina distal to base of mandible (Fig. 40; not fused in R. thayi ); b. Vein 1-R1 of fore wing 1.4 × as long as pterostigma (1.1 × in R. thayi ), and vein 3-SR 3.4 × vein r (4.0-4.8 × in R. thayi ); c. First metasomal tergite with dorsal carinae in whole length of tergite (in basal third in R. thayi ) and d. Precoxal sulcus sinuate, crenulate (straight and smooth medially in R. thayi ).