Dolichogenidea minuscula Liu & Chen, 2019
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publication ID |
https://doi.org/ 10.11646/zootaxa.4710.1.1 |
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publication LSID |
lsid:zoobank.org:pub:DC6FD1A7-ADEA-4631-B4FB-FE1E2DC89777 |
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persistent identifier |
https://treatment.plazi.org/id/03AC87CF-E14F-FFF2-7FF9-59C7FE59DF28 |
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treatment provided by |
Plazi |
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scientific name |
Dolichogenidea minuscula Liu & Chen |
| status |
sp. nov. |
Dolichogenidea minuscula Liu & Chen , sp. nov.
( Figs 43 View FIGURE 43 , 68 View FIGURE 68. 36–60 )
Description. Holotype. Female. Body length 1.4 mm, fore wing length 1.8 mm.
Head. Transverse in dorsal view, nearly 2.0× as wide as long, slightly wider than mesoscutum ( Fig. 43h View FIGURE 43 ). Temple very shiny and indistinctly punctate, strongly constricted behind eyes from dorsal view. Face ( Fig. 43i View FIGURE 43 ) weakly transverse, 0.8× as high as wide, shiny, superficially punctate, inner margins of eyes distinct converged posteriorly. Posterior tangent to anterior ocellus virtually touching posterior pair of ocelli, distance between fore and a hind ocellus not larger than diameter of an ocellus, POL:OD:OOL = 6.0:3.0:7.0. Antenna ( Fig. 43g View FIGURE 43 ) almost as long as body, penultimate antennomere 1.5× longer than wide.
Mesosoma. Length:width:height = 27.5:18.0:19.0. Disc of mesonotum ( Fig. 43f View FIGURE 43 ) shiny, with strong sparse punctures on posterior half, interspaces much larger than diameter of punctures. Scutellar sulcus nearly straight, relatively broad with carinae inbetween. Scutellum shiny, with indistinct punctures. Propodeum ( Fig. 43d View FIGURE 43 ) shiny, with well-defined lozenge-shaped areolation, three posterior fields polished and more or less smooth, anterio-lateral parts indistinctly punctate. Mesopleuron highly polished, with shallow punctures anteriorly.
Legs. Spines on outer side of hind tibia indistinct. Spurs of hind tibia of equal size, 2/5 length of basitarsus. Basitarsus of hind leg as long as tarsomeres 2–4.
Wings. Pterostigma 3.0× as long as its widest part ( Fig. 43b View FIGURE 43 ). Vein 1-R1 1.2× longer than pterostigma, 6.3× as long as its distance from apex of marginal cell. Vein r arising from apex of pterostigma, perpendicular to pterostigma, as long as width of pterostigma, r 1.4× longer than vein 2-SR, distinctly angled at meeting, 2-M over half length of 2-SR and weakly longer than 1-SR, 2-SR+M slightly shorter than 2-SR, m-cu as long as r. First discal cell of fore wing nearly 1.3× wider than high. Vein 2r-m of 1st submarginal cell of hind wing indistinct. Vein cu-a slightly incurved.
Metasoma. 0.8× as long as mesosoma. T1 ( Fig. 43d View FIGURE 43 ) parallel-sided, indistinctly constricted just before apex, 1.3× longer than hind width, basal 2/5 indistinctly concave and polished, turned-over part quadrate, shiny with weak wrinkles longitudinally, becoming shinier and polished to apex. Tergites (2+3) showing no differentiated basal area, totally smooth and shiny, suture between T2 and T3 indistinct. Tergites posterior to T1 highly polished, and shiny. Hypopygium distinctly shorter than apex of metasoma. Ovipositor sheath weakly longer than hind basitarsus (12.5:10.5), thin and parallel-sided, ovipositor straight without an apical attenuation.
Colour. Black ( Fig. 43a, d View FIGURE 43 ). Tegula brown. Palpi and spurs whitish. Antenna yellowish brown, becoming darker to apex. Ovipositor sheath evenly yellowish brown. Labrum light reddish brown and mandible yellowish. Legs whitish yellow, except coxae brown and hind tarsus more or less fumous. Wing membrane hyaline, vein 1-R1, C+SC+ R and upper border of pterostigma brown, pterostigma, r, 2-SR, 2-M and other veins yellowish whitish.
Variation. Body length 1.4–1.7 mm, fore wing length 1.8–1.9 mm.
Male. Body length 1.4–1.9 mm, fore wing length 1.8–2.1 mm. Similar to female, except: antenna much longer, with penultimate antennomere 2.7× longer than wide.
Material examined ( ZJUH). Holotype: ♀, Songyang, Zhejiang, 1986.X, Chen Hanlin , ex a larva of Lima- codidae, No. 870579 . Paratypes: 1♀ 4♂♂, same data as holotype ; 1♀, Jinshan, Fuzhou , Fujian, 1990.VII.20, Liu Changming, No. 20009361 .
Distribution. Oriental [ China: Fujian, Zhejiang].
Etymology. The specific name “ minuscula ” derived from the Latin adjective “minuscule”, referring to that it is exceptionally small in this group.
Remarks. This species is similar to D. caniae (Wilkinson) by straight and thin ovipositor, but differs in the following: vein r of fore wing distinctly longer than 2-SR (the latter equal to 2-SR); pterostigma yellowish whitish (the latter red-brown); and T2 polished and shiny (the latter with fine but very definite longitudinal striate, at most smooth and shiny medially).
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