Dolichogenidea parametacarp Liu & Chen, 2018

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 : 44-47

Dolichogenidea parametacarp Liu & Chen , sp. n.

Figures 22 , 38

Description. Female. Body length 1.7 mm, fore wing length 2.2 mm.

Head. Transverse in dorsal view, 1.9× as wide as long and a little narrower than mesoscutum (20.5:22.5). Temple relatively dull and shallowly punctate, a little rounded. Face relatively dull, with small punctations, sparsely pubescent, inner margin of eyes converged below, 0.7× as high as wide. Ocelli relatively small, distance between fore and a hind ocellus longer than diameter of an ocellus, posterior imaginary tangent to fore ocellus virtually touching hind two ocelli, POL:OD:OOL=3.0:2.0:3.0. Antenna distinctly longer than body, penultimate antennomere at least 1.5× longer than wide.

Mesosoma. Length:breadth:height=32.0:22.5:22.0. Disc of mesonotum relatively dull, finely punctate, interspaces not larger than diameter of punctures. Scutellar sulcus indistinctly curved, narrow with carinae in between. Scutellum relatively shiny, with shallow sparse punctures. Propodeum shiny, with setose setose sparse punctures anterior-laterally, areola U-shaped, middle part polished, posteral-lateral field polished with more carinae. Mesopleuron highly polished, with shallow setose punctures anteriorly.

Legs. Hind femur slightly shorter. Spines on outer side of hind tibia thick, relatively dense. Inner spur of hind tibia half length of hind basitarsus, outer spur slightly shorter (2/5). Basitarsus of hind leg weakly shorter than tarsomeres 2–4 combined (12.0:13.0).

Wings. Pterostigma relatively small, 3× as long as its widest part. Vein 1-R1 (metacarp) 1.3× longer than pterostigma, almost closing the marginal cell. Vein r arising from apex of pterostigma, almost as long as width of pterostigma, vein r weakly shorter than (or as long as) vein 2-SR, indistinctly angled at their meeting, vein 2-M half length of vein 2-SR. 1 st discal cell 1.3× wider than high. 1 st submarginal cell of hind wing 2× wider than high. Vein cu-a slightly curved.

Metasoma. Shorter than thorax (25.5:32.0). T1 gradually distinctly constricted to apex, 1.6× longer than wide posteriorly, concave at basal third, turned-over part shiny, smooth to uneven or sparsely shallowly punctate. T2 straight apically, 3.3× wider than long in the middle. T3 1.5× longer than T2. Tergites after T1 shiny, polished, sparsely pubescent. Hypopygium not longer than apex of abdomen. Ovipositor sheath only 2/3 length of hind tibia, thin and parallel-sided.

Colour. Body black. Tegula black. Spurs pale yellow. Palpi yellow. Antenna and ovipositor sheath evenly brown. Labrum and mandible dark red. Legs dark brown, except hind half of fore femur, fore and mid tarsi with tibiae and anterior quarter of hind tibia yellow. Wing membrane hyaline, vein 1-R1, C+SC+ R and upper border light brown, pterostigma and other veins pale yellow.

Variation. Body length 1.7–2.2mm.

Male. Unknown.

Host. Unknown.

Material examined. Holotype: ♀, Buyun, Shanghang, Fujian, 1988. VII.19–21, Ma Yun, No. 885061 . Paratypes: 1♀, Buyun, Shanghang, Fujian, 1988. VII.22–24, Ma Yun, No. 885242 ; 1♀, Mt. Wuyi , Fujian, 2007. VIII.22–25, Zeng Jie, No. 200806287 ; 1♀, Mt. Xiaowuuyi , Fujian, 1983. VII.26–29, Ma Yun, No. 832263 ; 1♀, Guihe, Shanghang , Fujian, 1999. III.30, Huang Jian, No. 20 004885 ; 1♀, Mt. Wuyi ( Aotou ), Fujian, 1983. VIII.1, He Junhua, No. 882518 ; 1♀, Luodi, Liancheng , Fujian, 1988. VIII.23, Huang Jian, No. 200 05532 ; 1♀, Luodi, Liancheng , Fujian, 1988. VIII.27, Huang Jian, No. 20005575 ; 1♀, Minjiangyuan, Jianning , Fujian, 2002. IX.26, Ruan Desong, No. 20024420 ; 1♀, Jianfengling, Hainan, 2007. V.9–14, Zhang Kuiyan, No. 200703664 ; 1♀, Jianfengling, Hainan, 2008. XI.22–23, Wang Manman, No. 200805951 ; 1♀, Mt. Nankun, Longmen , Guangdong, 2003. VII.20, Xu Zaifu, No. 20053808 ; 3♀♀, Chebaling, Shixing , Guangdong, 2002. IV.19, Xu Zaifu, Nos. 20050731, 20050560, 20050918 ; 1♀, Fengxi, Meizhou , Guangdong, 2003. VII.29, Chen Jujian, No. 20048740 ; 1♀, Dawuling, Xinyi, Guangdong, 2002. V.1–6, Xu Zaifu, No. 20025892 ; 1♀, Nanling, Fuyuan , Guangdong, 2003. VII.23, Xu Zaifu, No. 20049093 ; 1♀, Mt. Xiangtou, Huizhou , Guangdong, 2004. V.11, Xu Zaifu, No. 20053398 ; 1♀, Mt. Gutian , Zhejiang, 1986. VII.20, Xu Weiliang, No. 863754 ; 2♀♀, Mt. Fengyang, Longquan , Zhejiang, 2003. VIII.10, Liu Jingxian, Nos. 20048278, 20048242 ; 1♀, Qingyuan, Zhejiang, 1995.VIII, Wu Quancong, No. 965181 ; 1♀, Quzhou , Zhejiang, 1986. VIII.9, Qian Ying, No. 862 148 ; 3♀♀, Fuxin , Liaoning, 1994. VII.26, Lou Juxian, Nos. 951517, 951461, 951433 ; 1♀, Fuxin, Liaoning, 1995. VII.16–23, Lou Juxian, No. 961461 ; 4♀♀, Dongling, Shenyang , Liaoning, 1994. VII.10, Lou Juxian, Nos. 947232, 947230, 947245, 947261 ; 5♀♀, Dongliao, Jilin, 1988. VII.22–31, Lou Xiaoming, Nos. 888222, 888093, 888182, 888156, 888199 ; 1♀, Jingbohu , Heilongjiang, 1995. VII.26, Lou Juxian, No. 962214 ; 1♀, Jiamusi , Heilongjiang, 1992. VII.16, Lou Juxian, No. 950667 ; 1♀, Xiaguan , Yunnan, 1981. V.14, He Junhua, No. 813774 ; 1♀, Mt. Huping (Sanhecun), Shimen , Hunan, 2009. VII.11, Ma Li, No. 200901944 ; 1♀, Mt. Huping (peak), Shimen , Hunan, 2009. VII.12, Zeng Jie, No. 200900910 ; 1♀, Youxi , Zhejiang, 1998. X.15, Zheng Qi, No. 20005161.

Distribution. China (Fujian, Guangdong, Hainan, Hunan, Heilongjiang, Jilin, Liaoning, Yunnan, Zhejiang).

Etymology. The specific name “ parametacarp ” derived from the Latin prefix “para” and the name of speciesgroup metacarp, referring to it is relatively close to metacarp -group of the genus Apanteles .

Remarks. This species is similar to D. mycale Nixon but differs from the latter by the following: horizontal surface of T1 smooth to uneven or sparsely shallowly punctate (the latter conspicuously rugose all over); inner spur of hind tibia distinctly longer than outer one (the latter hardly longer); and penultimate antennomere more than 1.5× longer than wide, usually twice (the latter varying from one-and-one-third to one-and-a-half).

Figures

FIGURE 22. Dolichogenidea parametacarp Liu & Chen, sp. n. a propodeum and metasoma, dorsal view; b fore wing; c hind wing; d head, dorsal view; e mesonotum and scutellum; f head, frontal view; g habitus, lateral view. Scale line = 0.5 mm.

FIGURE 38. Distribution map of laevigata-group of Dolichogenidea species in China. *: Dolichogenidea parametacarp Liu & Chen, sp. n.; ■: Dolichogenidea partergita Liu & Chen, sp. n.; Δ: Dolichogenidea poliobrevis Liu & Chen, sp. n.; •: Dolichogenidea polystinelliphagous Liu & Chen, sp. n.; ♥: Dolichogenidea purdus (Papp, 1977); •: Dolichogenidea sandwico Liu & Chen, sp. n.; Ŧ: Dolichogenidea sicarius (Marshall, 1885).