Dolichogenidea rectivena 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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DOI |
https://doi.org/10.5281/zenodo.5587438 |
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persistent identifier |
https://treatment.plazi.org/id/03AC87CF-E172-FFC7-7FF9-5F28FCCBDEA3 |
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treatment provided by |
Plazi |
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scientific name |
Dolichogenidea rectivena Liu & Chen |
| status |
sp. nov. |
Dolichogenidea rectivena Liu & Chen View in CoL View at ENA , sp. nov.
( Figs 54 View FIGURE 54 , 69 View FIGURE 69. 61–75 )
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 View FIGURE 54 ). Temple shiny with shallow punctures, strongly constricted behind eyes from dorsal view. Face ( Fig. 54g View FIGURE 54 ) 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 View FIGURE 54 ) 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 View FIGURE 54 ) 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 View FIGURE 54 ). 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 View FIGURE 54 ).
Metasoma. Almost as long as mesosoma. T1 ( Fig. 54f View FIGURE 54 ) 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 View FIGURE 54 ). 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×).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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