Gasteruption nigritarse (Thomson, 1883)

Tan, Jiang-Li, Achterberg, Cornelis van, Wu, Jia-Xuan, Wang, Hang & Zhang, Qi-Jing, 2021, An illustrated key to the species of Gasteruption Latreille (Hymenoptera, Gasteruptiidae) from Palaearctic China, with description of four new species, ZooKeys 1038, pp. 1-103 : 1

Gasteruption nigritarse (Thomson, 1883) Figs 174-175 , 176-187 , 188 , 189-194

Foenus nigritarsis Thomson, 1883: 849; Schletterer 1889: 398; Hedicke 1939: 7; Hedqvist 1973: 181, 182 (lectotype designation); Wall 1994: 149. Synonymised with G. assectator (Linnaeus) by Schletterer (1889).

Gasteruption nigritarse ; Schletterer 1885: 310; Johansson and van Achterberg 2016: 84-86; Orlovskytė et al. 2018: 123.

Type material.

The female lectotype from Lund (Scania, S Sweden) was selected by Hedqvist (1973). All 12 specimens (both males and females) of the series under Foenus nigritarsis in ZIL (including the lectotype by Hedqvist) belong to the same distinct species ( Johansson and van Achterberg 2016).

Additional material.

3 ♀ (NWUX), NW China: Shaanxi, Qiligou, Xunyangba , 507 m alt, 1.vii.2019, 32°91'N, 109°68'E, hand net, Tan JL ; 1 ♀ + 1 ♂ (RMNH), NW China: Shaanxi, NWU Taibai campus, ca. 410 m alt., 34°15'N, 108°55'E, small garden, on flowers of Cayratia japonica (Thunberg), 4.viii.2017, C. v. Achterberg ; 2 ♀, NWU Chang’an campus, on flowers of Daucus carota L. 30.vi.2020, JL Tan ; 1 ♀ (NWUX), "NW China: Gansu, Lianjiabian, Taibai Heshui , sweep net, 36.06°N, 108.54°E, 8.viii.2019, alt. 1193 m, Ruonan Zhang, NWUX" ; 4 ♀ (NWUX, RMNH), "NW China: Shaanxi, Xialiangzhen, Zhashui, Shangluo , sweep net, alt. 1059 m, Ruonan Zhang, NWUX" .

Distribution.

Europe; China (Gansu, Shaanxi). Collecting a couple of this species in the small NWU garden (at the Taibai campus in the very centre of Xi’an) on bush-killer, Cayratia japonica (Thunb.) Gagnep. was a real surprise. New for China, Gansu, Shaanxi and even for the East Palaearctic Region.

Notes.

The Chinese specimens have the temple slightly longer than in European specimens (the eye/temple ratio is the same in the examined specimens) and the hind tibia is slightly more inflated. Both are likely part of clinal variation and, therefore, the Chinese specimens are considered to be conspecific.

Figures

Figure 188. Gasteruption nigritarse (Thomson), male, Shaanxi, habitus lateral.

Figures 174 - 175. Gasteruption nigritarse (Thomson), female, Shaanxi 174 habitus lateral 175 ovipositor and its sheath lateral.

Figures 176 - 187. Gasteruption nigritarse (Thomson), female, Shaanxi 176 head lateral 177 details of hypostomal bridge 178 mesosoma lateral 179 mesosoma dorsal 180 fore wing 181 hind leg 182 head anterior 183 head dorsal 184 apex of metasoma ventral 185 details of apex of ovipositor sheath 186 base of antenna 187 apex of antenna.

Figures 189 - 194. Gasteruption nigritarse (Thomson), male, Shaanxi 189 mesosoma dorsal 190 apex of metasoma lateral 191 base of antenna 192 head dorsal 193 hind legs 194 apex of antenna.