Dolichogenidea poliobrevis Liu & Chen

Liu, Zhen, He, Jun-Hua & Chen, Xue-Xin, 2018, The laevigata - group of the genus Dolichogenidea Mason, 1981 from China, with descriptions of 26 new species, Zootaxa 4436 (1), pp. 1-74: 50

publication ID

https://doi.org/10.11646/zootaxa.4436.1.1

publication LSID

lsid:zoobank.org:pub:2F387153-0204-49B7-B654-84E6C0466733

persistent identifier

http://treatment.plazi.org/id/2D033238-0E3E-AC2D-FF61-ACF7FF73A7D6

treatment provided by

Plazi

scientific name

Dolichogenidea poliobrevis Liu & Chen
status

sp. n.

Dolichogenidea poliobrevis Liu & Chen  , sp. n.

Figures 24 View Figure , 38 View Figure

Description. Female. Body length 2.1 mm, fore wing length 2.2 mm.

Head. Transverse in dorsal view, 1.9× as wide as long as long as mesoscutum. Temple shiny, polished and impunctate, a little broad. Face relatively shiny, almost impunctate, pubescent, inner margin of eyes converged below, less transverse, nearly 0.8× as high as wide. Ocelli small, distance between fore and a hind ocellus longer than diameter of an ocellus, posterior imaginary tangent to fore ocellus touching hind two ocelli, POL:OD:OOL=4.0:1.5:3.5. Antenna distinctly shorter than body, penultimate antennomere cubic.

Mesosoma. Length:breadth:height=35.0:22.0:23.0. Disc of mesonotum shiny, almost impunctate. Scutellar sulcus nearly straight, finely crenulated. Scutellum highly shiny, polished without punctures. Propodeum shiny, entirely polished, relatively short. Mesopleuron highly polished, without punctures anteriorly.

Legs. Spines on outer side of hind tibia dispersed. Inner spur of hind tibia half length of hind basitarsus, outer spur slightly shorter (2/5). Basitarsus of hind leg a little shorter than tarsomeres 2–4 combined (12.0:14.0).

Wings. Pterostigma 2.7× as long as its widest part. Vein 1-R1 (metacarp) 1.4× longer than pterostigma, 5.5× as long as its distance from the apex of the marginal cell. Vein r arising  from middle of pterostigma, as long as width of pterostigma, vein r indistinctly  longer than vein 2-SR, angled at their meeting, vein 2-M half of vein 2-SR. 1 st discal  cell as wide as high. 1 st submarginal  cell of hind wing 2× wider than high. Vein cu-a curved.

Metasoma. Indistinctly longer than thorax (37.0:35.0). T1 parallel-sided, as long as wide posteriorly, indistinctly concave at basal 2/5, turned-over part highly shiny, highly polished. T2 weakly curved into T3, 3× wider than long in the middle. T3 1.6× longer than T2. All tergites highly shiny, polished, sparsely pubescent. Hypopygium not longer than apex of abdomen. Ovipositor sheath nearly as long as hind tibia.

Colour. Body black. Tegula, spurs and palpi yellow. Labrum and mandible dark reddish yellow. Antenna and ovipositor sheath evenly brown. Fore and mid tibiae with tarsi, hind half of mid femur, anterior half of hind tibia and most of hind tarsus bright yellow, the left yellowish brown to dark brown. Wing membrane hyaline, vein 1-R1 and pterostigma brown, vein C+SC+R, r, 2-SR and 2-M yellowish brown, other veins pale yellow.

Variation. Legs of specimens from Liaoning and Heilongjiang darker and ovipositor sheath of specimen from Shenyang distinctly shorter (almost 3/4 length of hind tibia).

Male. Unknown.

Host. According to the label: Anarsia lineatella Zeller  ( Lepidoptera  : Gelechiidae  ).

Material examined. Holotype: ♀, Dongyang , Zhejiang, 1987  . VIII.10, Xu Weiliang, No. 875200. Paratypes: 2♀♀, Dongyang , Zhejiang, 1987  . VIII.10, Xu Weiliang, Nos. 8 75274, 875127; 1♀, Tiantai , Zhejiang, 1988  . VIII.24, Chen Jianming, No. 888505; 1♀, Qingyuan, Zhejiang, 1985. VII.26–27, Wu Quancong, No. 851909; 1♀, Mt. Longwang   , Anji, Zhejiang, 1995  . X.18, Wu Hong, No. 970249; 1♀, Hangzhou (light trap), Zhejiang, 1979.IV–V, Wang Huiping, No. 790834; 1♀, Mt. Wuyi   , Fujian, 1989. VII.5–10, He Junhua, No. 894765; 1♀, Linzhi ( College of agriculture and animal husbandry), Tibet, 2003  . VII.14, Dejimuduo, No. 20035312; 2♀♀, Fuxin , Liaoning, 1994  . VII.26, Lou Juxian, Nos. 951476; 951469; 1♀, Jingbohu , Heilongjiang, 1995  . VII.26, Lou Juxian, No. 962064; 1♀, Shenyang, Liaoning, 1995.VI–VII, Lou Juxian, No. 960754; 5♀♀ 3♂♂, Laomancheng, Xinjiang, 1977.VIII, Ma Wenliang , host: Anarsia lineatella Zeller, No.  780960. 

Distribution. China (Fujian, Heilongjiang, Liaoning, Tibet, Xinjiang, Zhejiang).

Etymology. The specific name “ poliobrevis  ” derived from the Latin adjective “polio” and “brevis”, referring to the propodeum short and polished.

Remarks. This species is similar to D. eleagnellae Tobias  but differs from the latter by the following: scutellar sulcus narrow and shallow, with 16 carinae in between; vein r and  2-SR distinctly angled at their meeting; and T1 shorter.