Dolichogenidea rectivena Liu & He & Chen & Gupta & Moghaddam 2019, sp. nov.
Creators: name: Liu, Zhen
name: He, Jun-Hua
name: Chen, Xue-Xin
name: Gupta, Ankita
name: Moghaddam, Mostafa Ghafouri
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Dolichogenidea
Dolichogenidea rectivena

description: Dolichogenidea rectivena Liu & Chen, sp. nov.
(Figs 54, 69)
Description. Holotype. Female. Body length 2.2 mm, fore wing length 2.4 mm.
Head. Transverse in dorsal view, 2.1× as wide as long, 0.9× as wide as mesoscutum (Fig. 54c). Temple shiny with shallow punctures, strongly constricted behind eyes from dorsal view. Face (Fig. 54g) transverse, 0.8× as high as wide, slightly shiny with indistinct punctuation, inner margins of eyes subparallel. Posterior tangent to anterior ocellus virtually touching posterior pair of ocelli, distance between fore and a hind ocellus indistinctly longer diameter of an hind ocellus, POL:OD:OOL = 3.3:1.8:4.0, a black line extending from middle ocellus to occiput. Antenna shorter than body length, penultimate antennomere 1.3× longer than wide.
Mesosoma. Length:width:height = 39.8:25.0:28.0. Disc of mesonotum (Fig. 54e) slightly shiny, shallowly punctate, posterior half slightly rough with indistinct punctures, punctures widely absent before posterior margin. Scutellar sulcus nearly straight, broad with carinae inbetween. Scutellum shiny and polished without punctuation. Propodeum (Fig. 54f) shiny, with well-defined areolation which U-shaped at bottom and open at anterior end, lateral carinaelateral carinae areola bifurcated medially, costulae well-defined, three posterior fields shiny and polished, anterio-lateral parts shiny and without punctures. Mesopleuron highly polished, anterior part finely, shallowly punctate.
Legs. Hind coxa shiny without punctures. Spines on outer side of hind tibia acuminated and dense. Inner spur of hind tibia 2/5 length of hind basitarsus, outer spur 1/3 length of hind basitarsus. Basitarsus of hind leg as long as tarsomeres 2–4.
Wings. Pterostigma large, 2.5× as long as its widest part (Fig. 54b). Vein 1-R1 1.2× longer than pterostigma, 5.1× as long as its distance from apex of marginal cell. Vein r arising from middle of pterostigma, distinctly inclined outwards, nearly as long as width of pterostigma, r 1.3× longer than 2-SR, angled at meeting, 2-M half length of 2-SR and weakly longer than 1-SR and weakly shorter than 2-SR+M, m-cu as long r. First discal cell of fore wing 1.2× wider than high. Second discal cell of hind wing 1.7× wider than high. Vein cu-a straight (Fig. 54d).
Metasoma. Almost as long as mesosoma. T1 (Fig. 54f) parallel-sided, weakly widened posteriorly, 1.4× longer than hind width, basal 1/3 concave, polished, turned-over part fully as long as wide, punctate-rugulose medially, polished at posterior 1/3. T2 nearly polished entirely, 4.5× wider than long in middle, strongly curved apically. T3 2× longer than T2. Tergites posterior to T2 polished, shiny, and pubescent. Hypopygium shorter than apex of metasoma. Ovipositor sheath 1.2× longer than hind tibia, distinctly broad at apex, ovipositor relatively thin, slightly curved, without apical attenuation.
Colour. Reddish brown (Fig. 54a). Tegula reddish yellow. Palpi and spurs whitish yellow. Antenna reddish yellow. Ovipositor sheath. Labrum light reddish brown, mandible more yellowish. Legs yellow, coxae reddish brown, reddish on apical 1/4 of hind tibia and tarsus. Wing membrane hyaline, vein 1-R1, C+SC+ R and upper border of pterostigma testaceous, pterostigma, r, 2-SR and 2-M whitish yellow, other alar veins almost colourless, pterostigma without whitish basal spot.
Variation. Body length 2.1–2.2 mm, fore wing length 2.4–2.6 mm. Some specimens with slightly whitish basal spot on pterostigma, T2 weakly rugulose laterally or scutellum with shallow punctures.
Male. Body length 2.0 mm, fore wing length 2.5 mm. Similar to female, except: T2 less transverse, 3.2× wider than long in middle, body entirely darker and punctures on mesonotum heavier (last eight antennomeres missing).
Material examined (ZJUH). Holotype: ♀, Hangzhou, Zhejiang, 1959.VII.16, Xie Bingzhang, ex Glyphodes pyloalis Walker, No. 5928.3. Paratypes: 7♀♀ 1♂, same data as holotype.
Distribution. Oriental [China: Zhejiang].
Etymology. The specific name “ rectivena ” derived from the Latin “rectus” and “vena”, referring to vein cu-a of hind wing straight.
Remarks. This species is closely similar to D. transcarinata Liu & Chen, sp. nov. but differs in the following: T2 polished to weakly rugulose (the latter strongly rugose); vein cu-a of hind wing straight (the latter weakly curved inward); and T3 2.0× length of T 2 in middle (the latter 1.4×).
description: Published as part of Liu, Zhen, He, Jun-Hua, Chen, Xue-Xin, Gupta, Ankita & Moghaddam, Mostafa Ghafouri, 2019, The ultor - group of the genus Dolichogenidea Viereck (Hymenoptera, Braconidae, Microgastrinae) from China with the descriptions of thirty-nine new species, pp. 1-134 in Zootaxa 4710 (1) on pages 108-110, DOI: 10.11646/zootaxa.4710.1.1, http://zenodo.org/record/3587475