Dolichogenidea lincostulata Liu & Chen, 2019

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, Zootaxa 4710 (1), pp. 1-134 : 73-75

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Dolichogenidea lincostulata Liu & Chen

sp. nov.

Dolichogenidea lincostulata Liu & Chen , sp. nov.

( Figs 35 View FIGURE 35 , 68 View FIGURE 68. 36–60 )

Description. Holotype. Female. Body length 1.9 mm, fore wing length 2.3 mm.

Head. Transverse in dorsal view, 1.9× as wide as long, 0.9× as wide as mesoscutum ( Fig. 35g View FIGURE 35 ). Temple rough with indistinct punctures, slightly rounded behind eyes from dorsal view. Face ( Fig. 35h View FIGURE 35 ) transverse, 0.8× as high as wide, shiny with shallow small punctures, inner margins of eyes distinctly converged towards apex. Ocelli large, posterior tangent to anterior ocellus weakly transecting posterior pair of ocelli, distance between fore and a hind ocellus shorter than diameter of an hind ocellus, POL:OD:OOL = 3.0:2.0:4.0. Antenna distinctly longer than body length, penultimate antennomere 1.7× longer than wide.

Mesosoma. Length:width:height = 37.0:24.0:24.5. Disc of mesonotum ( Fig. 35f View FIGURE 35 ) a little shiny with fine punctures, polished without puncture apically. Scutellar sulcus straight, narrow with sparse carinae inbetween. Scutellum shiny, several shallow punctures scattered anteriorly and laterally. Propodeum ( Fig. 35c View FIGURE 35 ) shiny, with lozenge-shaped areolation obscure-defined by bunch of rugosities which open at anterior end, posterio-lateral fields nearly 2.0× longer than wide, highly shiny and almost polished except rugose at corners, costulae extremely narrow or hardly present, with dispersed coarse punctures anteriorly and inside the areolation. Mesopleuron highly polished, anterior part shallowly punctate.

Legs. Hind coxa shiny with superficial punctures. Spines on outer side of hind tibia relatively stout and dispersed. Inner spur of hind tibia half length of hind basitarsus, outer spur 2/5 length of hind basitarsus. Basitarsus of hind leg weakly longer than tarsomeres 2–4 (14.5:13.5).

Wings. Pterostigma 2.3× as long as its widest part ( Fig. 35d View FIGURE 35 ). Vein 1-R1 1.4× longer than pterostigma, 6.3× as long as its distance from apex of marginal cell. Vein r arising from middle of pterostigma, perpendicular to pterostigma, a little longer than width of pterostigma, r curved with 2-SR at meeting, 2-M as long as 1-SR and a little longer than 2-SR+M. First discal cell of fore wing as wide as high. Second discal cell of hind wing 1.8× wider than high. Vein cu-a straight and perpendicular to 1-1A ( Fig. 35b View FIGURE 35 ).

Metasoma. 0.7× longer than mesosoma. T1 ( Fig. 35e View FIGURE 35 ) parallel-sided at anterior 2/3, strongly constricted at posterior 1/3, 1.7× longer than hind width, basal 1/3 indistinctly concave, polished medially, rugulose laterally, turnedover part depressed and polished medially, others strongly rugose. T2 shiny and polished except a row of small punctures transversely, 3.3× wider than long in middle, weakly curved apically. T3 1.5× longer than T2. Tergites posterior to T2 polished, shiny, and sparsely pubescent. Hypopygium extremely short. Ovipositor sheath half length of basitarsus, ovipositor narrow, taped towards apex.

Colour. Black ( Fig. 35a View FIGURE 35 ). Tegula brown. Palpi and spurs whitish. Pedicel and scape yellow. Flagellum yellowish brown. Ovipositor sheath brown. Labrum dark yellowish brown and mandible more yellowish. Legs bright yellow, coxae black, posterior 1/3 of hind tibia infuscated. Wing membrane hyaline, pterostigma, vein C+SC+R, 1-R1, r and 2-SR light yellowish brown and other alar veins more or less yellowish, pterostigma with an obscure whitish basal spot.

Variation. Body length 1.9–2.2 mm, fore wing length 2.3–2.4 mm. An individual with longer ovipositor sheath (nearly as long as basitarsus).

Male. Body length 2.0 mm, fore wing length 2.3 mm. Similar to female, except: T1 shiny and polished except several punctures; areolation and costulae indistinct and penultimate antennomere fully 2.0× longer than wide.

Material examined ( ZJUH). Holotype: ♀, Zhangzhou , Fujian, 1984.XI.5, collector unknown, ex Conopomorpha cramerella (Snellen) , No. 881414 . Paratypes: 2♀♀ 1♂, same data as holotype .

Distribution. Oriental [ China: Fujian].

Etymology. The specific name “ lincostulata ”, derived from the Latin “linea” and “costulatus”, referring to costulae on propodeum extremely narrow and straight.

Remarks. This species is similar to D. hyposidra (Wilkinson) , but differs in the following: hind femur yellow (the latter black); T1 strongly constricted towards apex (the latter parallel or weakly wided towards apex); and areolation obscurely defined (the latter well-defined.