Trispinaria vietnamica Long, 2020

Oanh, Nguyen Thi, Long, Khuat Dang, Mai, Pham Quynh & Dzuong, Nguyen Van, 2020, First record of the genus Trispinaria Quicke, 1986 (Hymenoptera, Braconidae, Braconinae) in Vietnam, with descriptions of two new species, ZooKeys 996, pp. 107-119 : 107

Trispinaria vietnamica Long sp. nov. Figures 13 , 14-24

Material.

Holotype, ♀, “Bracn.376” (IEBR), S Vietnam: Pleicu, Dak Do, Ha Bau,> 800 m, bushes, 08.vi.2005, KD Long. Paratypes: 6 ♀, “Bracn.377” (IEBR), data as holotype; “Bracn.708” (IEBR), NE Vietnam: Thai Nguyen, Dai Tu, Cat Ne, MT, orchard, 21°31'24"N, 105°29'39"E, 302 m, 30.xi.2006, KD Long; “Bracn.708” (VNMN), ibid. but 5.xi.2006, KD Long; “Bracn.747” (IEBR), ibid, but 25.xii.2006, KD Long; “Bracn.1481” (IEBR), NW Vietnam: Son La, coffee orchard, MT, 21°18'06"N, 103°55'36"E, 663 m, 10.iii.2018, KD Long, NV Dzuong; “Bracn.1491” (IEBR), NW Vietnam: Hoa Binh, Luong Son, Thanh Lap, fruit orchard, MT, 20°48'46"N, 105°37'58"E, 20 m, 5.ii.2018, STCT.

Description.

Holotype, female, body length 8.3 mm, fore wing length 7.2 mm, antenna 7.7 mm, ovipositor sheath 1.8 mm (Fig. 13 ).

Head. Antenna with 74 antennomeres; length of third and fourth antennomeres 1.6 × and 1.4 × their width, respectively (8: 5) (7: 5); length of subapical antennomere as long as wide (3: 3); in frontal view, width of face 0.5 × its length (33: 16) (Fig. 14 ); length of maxillary palp 0.8 × height of head (36: 45); malar space 0.8 × as long as basal width of mandible (10: 13); face flattened, punctate-coriaceous and rather matt; clypeus convex medially, depressed laterally, its apical margin concave and with distinct carina (Fig. 14 ); distance between tentorial pits 1.6 × distance from pit to eye margin (13: 8); in lateral view, eye 2.5 × temple (20: 8); in dorsal view, width of head 1.9 × median length (62: 33); POL: OD: OOL = 6: 4: 13 (Fig. 15 ); eye 3.4 × temple (24: 7); frons smooth, weakly concave.

Mesosoma. Length of mesosoma 1.6 × its height (85: 54); propleuron wide, deep and crenulate medially (Fig. 17 ); middle lobe of mesoscutum without impressions anteriorly; notauli deeper anteriorly, wider and flat posteriorly, with median longitudinal carina and transversely rugose posteriorly (Fig. 16 ); prescutellar sulcus narrow, crenulate; mesoscutal lobes sparsely punctate; mesopleuron rugose-punctate anteriorly, coriaceous medially, punctate ventrally (Fig. 17 ); metapleuron rugose-punctate; propodeum with deep crenulate depression, posterior V-shaped carina indistinct (Fig. 22 ); surface of propodeum rugose-punctate on anterior 0.7 of propodeum, almost smooth latero-posteriorly.

Wings. Length of fore wing 3.1 × its maximum width (225: 72); length of pterostigma 3.2 × its width (48: 15); fore wing vein SR1 5.1 × as long as vein 3-SR (76: 15); r: 3-SR: SR1 = 15: 15: 76; cu-a slightly reclivous (Fig. 18 ); cu-a: 2-CU1 = 12: 34; 2-SR: 3-SR: r-m = 17: 15: 16; second submarginal cell of fore wing rather robust (Fig. 18 ); hind wing vein 1-M thick and evenly curved basally (Fig. 21 ); vein 1r-m of hind wing largely united with 1-SC+R (Fig. 21 ).

Legs. Hind coxa densely setose latero-ventrally, but without setae dorso-apically; length of femur, tibia and basitarsus of hind leg 4.0 ×, 9.4 × and 6.7 × their width, respectively; length of hind inner and outer tibial spurs 0.5 × and 0.4 × hind basitarsus, respectively; length of hind basitarsus 0.4 × hind tibia (40: 94) and 0.7 × second-fifth tarsus (40: 55); tarsal claw with large acute lobe (Fig. 19 ).

Metasoma. Length of first tergite 0.7 × its apical width (31: 45), with wide and deep basal excavation (Fig. 23 ); antero-lateral groove wide and deep, crenulate; median length of second tergite 0.85 × third tergite (28: 33); first metasomal tergite posteriorly, second-sixth metasomal tergites entirely coarsely reticulate; medio-apical tooth of sixth tergite developed; latero-apical groove of sixth metasomal tergite wide, crenulate (Fig. 24 ); length of ovipositor sheath 0.25 × fore wing (18: 72); ovipositor with dorsal nodus and apico-ventrally with serrations (Fig. 20 ). Colour. Pale yellow; scapus dark brown; twenty four middle antennomeres yellow; palpi yellow; stemmaticum brown; mesoscutal lobes black, except median lobe posteriorly and lateral lobes anteriorly pale yellow; scutellum and metanotum, fore and middle legs pale yellow; hind leg dark brown to black, except coxa basally, trochantellus and lateral strip on hind femur yellow; hind tibial spurs pale yellow; propodeum largely black, pale yellow apically; pterostigma and veins brown; wing membrane subhyaline; large patches of six basal metasomal tergites black; ovipositor sheath brown; ovipositor reddish yellow.

Variations.

Length of body 5.4-8.4 mm, of fore wing 4.9-7.1 mm; antennae 65-70 antennomeres; 18-34 middle antennomeres yellow or antennae brown entirely; stemmaticum yellow; vein SR1 of fore wing 4.0-6.2 × vein 3-SR; length of ovipositor sheath 0.22-0.3 × fore wing; middle tarsus brownish yellow; hind tibial spurs brown.

Male. Unknown.

Biology.

Unknown.

Etymology.

The name of the species originates from the name of the country, where the holotype was collected.

Distribution.

N Vietnam: Son La, Thai Nguyen, Hoa Binh; S Vietnam: Pleicu.

Notes.

Trispinaria vietnamica sp. nov. differs from T. seminigra sp. nov. by having: first metasomal tergite with wide and deep basal excavation (narrow and deep in T. seminigra ); median length of first metasomal tergite 0.7 × as long as its apical width (0.9 × in T. seminigra ); propleuron wide and deep, crenulate (propleuron with distinct V-shaped carina posteriorly in T. seminigra ); fore wing vein cu-a interstitial and weakly inclivous (vein cu-a vertical in T. seminigra ); hind wing vein 1-M thick and curved basally (vein 1-M weakly curved basally in T. seminigra ); middle coxa and mesopleuron pale yellow (black in T. seminigra ); ovipositor apico-ventrally with serrations (apico-ventrally without serrations in T. seminigra ).

The new species, T. vietnamica sp. nov., is similar to T. maculata van Achterberg, from India, Singapore, Sri Lanka, and Taiwan by sharing the following characters: vein 1r-m of hind wing nearly united with vein 1-SC+R; apical half of subbasal cell of fore wing largely glabrous; and frons smooth. The new species can be inserted into the key by van Achterberg (1991) as follows:

Figures

Figure 13. Trispinaria vietnamica Long, sp. nov., holotype, female, habitus, lateral view.

Figures 14 - 24. Trispinaria vietnamica Long, sp. nov., holotype, female 14 head, frontal view 15 head, dorsal view 16 mesonotum 17 mesopleuron 18 Fore wing 19 hind telotarsus and tarsal claw 20 apex of ovipositor 21 hind wing 22 propodeum 23 first and second metasomal tergites, lateral view 24 fifth and sixth metasomal tergites, lateral view.