Dolichogenidea hexagona 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-E125-FF95-7FF9-5E3BFA00D8C8 |
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treatment provided by |
Plazi |
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scientific name |
Dolichogenidea hexagona Liu & Chen |
| status |
sp. nov. |
Dolichogenidea hexagona Liu & Chen , sp. nov.
( Figs 29 View FIGURE 29 , 67 View FIGURE 67. 21–35 )
Description. Holotype. Female. Body length 1.8 mm, fore wing length 2.0 mm.
Head. Transverse in dorsal view, 1.9× as wide as long, 1.1× wider than mesoscutum ( Fig. 29e View FIGURE 29 ). Temple shiny with shallow punctures, not constricted behind eyes from dorsal view. Face ( Fig. 29h View FIGURE 29 ) transverse, 0.8× as high as wide, highly shiny with small punctures, inner margins of eyes subparallel. Ocelli rather small, posterior tangent to anterior ocellus not touching posterior pair of ocelli, distance between fore and a hind ocellus a little longer than diameter of an hind ocellus, POL:OD:OOL = 3.0:1.3:4.0. Antenna as long as body length, penultimate antennomere 1.7× longer than wide.
Mesosoma. Length:width:height = 27.0:18.0:20.0. Disc of mesonotum ( Fig. 29f View FIGURE 29 ) shiny, posterior half polished and with sparse, discrete punctures, which widely absent along posterior margin and medio-posteriorly. Scutellar sulcus curved, narrow with sparse carinae inbetween. Scutellum highly shiny, polished except shallow punctures anterio-laterally. Propodeum ( Fig. 29d View FIGURE 29 ) slightly shiny, with less well-defined hexagon-shaped areolation which closed at at anterior end, three posterior fields a little shiny and nearly polished, medio-anterior parts punctate-rugose, lateral-anterior parts shiny with sharp, small punctures. Mesopleuron highly polished, anterior part with shallow, sparse punctures.
Legs. Hind coxa shiny and polished. Spines on outer side of hind tibia rather sparse. Inner spur nearly half length of hind basitarsus, outer spur nearly 2/5. Basitarsus of hind leg weakly shorter than tarsomeres 2–4 (11.0:12.0).
Wings. Pterostigma 3.3× as long as its widest part ( Fig. 29b View FIGURE 29 ). Vein 1-R1 1.6× longer than pterostigma, 5.5× as long as its distance from apex of marginal cell. Vein r arising from apex of pterostigma, r weakly inclined outwards, indistinctly shorter than width of pterostigma, 0.7× as long as 2-SR, distinctly angled with 2-SR at meeting, 2-M 3/5 length of 2-SR and a little longer than 1-SR and as long as 2-SR+M, m-cu 1.2× longer than 2-SR. First discal cell of fore wing nearly 1.4× wider than high. Second discal cell of hind wing 1.7× wider than high. Vein cu-a strongly curved ( Fig. 29c View FIGURE 29 ).
Metasoma. 1.1× longer than mesosoma. T1 ( Fig. 29i View FIGURE 29 ) parallel-sided, 1.4× longer than hind width, basal one third concave, polished, turned-over part quadrate, punctate-rugose medially, weakly rugulose to polished apically. T2 shiny and polished, 3.3× wider than long in middle, weakly curved apically, sulcus between T2 and T3 not distinct. T3 1.5× longer than T2. Tergites posterior to T2 shiny, polished and sparsely pubescent. Hypopygium slightly shorter than apex of metasoma. Ovipositor sheath 1.1× length of hind tibia, thin and nearly parallel-sided. Ovipositor thick, with distinct apical attenuation, 3/5 length of basitarsus.
Colour. Dark reddish brown to black, tergites posterior to T1 more or less light ( Fig. 29a, i View FIGURE 29 ). Tegula brown. Palpi and spurs whitish yellow. Antenna and ovipositor sheath brown. Labrum and mandible light reddish brown. Legs brown, except fore leg, apex of mid femur, mid tibia, mid tarsus, and basal 1/5 of hind tibia bright dirty yellow. Wing membrane hyaline, 1-R1, C+SC+R, and upper border of pterostigma brown, remaining pterostigma, r, 2-SR and 2-M whitish brown, other alar veins colourless.
Variation. Body length 1.8–2.0 mm, fore wing length 2.0– 2.4 mm. Wings weakly brownish in one specimen from Mt. Longwang.
Male. Body length 2.0 mm, fore wing length 2.3 mm. Similar to female, except: sulcus between T2 and T3 more indistinct and rugosity on T1 weak (last 13 antennomeres missing).
Material examined ( ZJUH). Holotype: ♀, Hangzhou , Zhejiang, 1989.IX.8, He Junhua, No. 895997 . Paratypes: 1♀, Hangzhou , Zhejiang, 1989.X.6, He Junhua, No. 896182 ; 1♀, Hangzhou , Zhejiang, 1981.X.1, Sun Guoliang, No. 815536 ; 2♀♀, Hangzhou , Zhejiang, 1979.V–VI, Wang Huiping, light trap, No. 790834 ; 1♀, Lishui , Zhejiang, 1981.IX.27, Zhu Kunyan, No. 815587 ; 1♀, Mt. Jiulong, Suichang , Zhejiang, 1994.VIII.18, He Junhua, No. 944086 ; 3♀♀, Wencheng , Zhejiang, 1985.IX, Liu Fuming, Nos. 853099, 853094, 853035, 853095 ; 1♀ 1♂, Kunming, Yun- nan, 1975.II, Wang Lvzhe , ex Agrotis segetum (Denis & Schiffermuller) , Nos. 760623 (♀), 760622 (♂) ; 1♀, Kun- ming, Yunnan, 1974, Wang Lvzhe, No. 760622 ; 1♀, Wenshan , Yunnan, 1977.VII.20, Sun Zhenyang, ex Mythimna separata (Walker) , No. 771171 ; 1♀, Yantai , Shandong, 1975, Sericultural Research Institute, ex Lymantria dispar L., No. 76074 ; 1♀, Mt. Longwang, Anji , Zhejiang, 1996.VI.24, Li Qiang, No. 963128 .
Distribution. Eastern Palaearctic [ China: Shandong]; Oriental [ China: Yunnan, Zhejiang].
Etymology. The specific name “ hexagona ” derived from the Latin, referring to areolation on propodeum hexagon-shaped.
Remarks. This species is similar to D. angularis Song & Chen , but differs in the following: T2 polished (the latter rugose-striate); posterolateral fields of propodeum polished (the latter with a considerable number of coarse rugosities); and first discal cell of fore wing nearly 1.4× wider than high (the latter very slightly wider than high).
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