Limonia macrostigma (Schummel, 1829)

Ren, Jinlong & Yang, Ding, 2020, Two new species of Limonia Meigen, 1803 from Northwest China (Diptera, Limoniidae), ZooKeys 971, pp. 31-58 : 31

1. Limonia macrostigma (Schummel, 1829) Figures 1-3 , 4-7 , 8-9

Limnobia macrostigma Schummel 1829: 108.

Limonia alpicola Lackschewitz 1928: 231 (synonymy after Starý 2007).

Limonia (Limonia) venerabilis Alexander 1938: 134 (synonymy after Podenas and Podeniene 2017).

Limonia macrostigma Schummel: Savchenko 1985: 167; 1989: 333.

Limnobia macrostigma Schummel: Podenas and Podeniene 2017: 16 (redescription).

Diagnosis.

Flagellar verticils 2 times length of corresponding segment. Prescutum with three dark-brown longitudinal stripes. Wing pale brown with distinct, large, brown stigma ; apical Sc1 slightly beyond base of Rs. Posterior margin of tergite 9 broadly emarginated. Paramere ending at 5/6 of aedeagus. Female, hypogynial valve 3.7 times longer than wide at base.

Redescription.

Male (n = 10): body length 7-9 mm, wing length 8-9.5 mm.

Head mostly dark brown (Figs 6 , 7 ). Vertex dark brown. Occiput dull yellow. Head with black setulae. Antenna dark brown and 14-segmented; pedicel oval; flagellomeres pale brown, nearly cylindrical; flagellar verticils black, 2 times longer than corresponding segment. Rostrum and nasus brown to dark brown. Nasus 3/5 as long as rostrum. Labella pale yellow except inner margin brown, with black setulae. Palpi black brown with black setulae, terminal two segments pale brown.

Thorax mostly brown (Figs 1 , 2 ). Cervical sclerite brown with black outer margin. Pronotum dull brown with black setulae. Prescutum with three dark-brown longitudinal stripes, median one with black setulae at outer margin. Scutum dark brown with black setulae at postero-lateral margin. Scutellum brown with tapered yellow median stripe. Mediotergite dark brown (Fig. 2 ). Mesopleura yellow to dark brown; subspiracular sclerite dull brown with pale-yellow spot at postero-lateral corner; episternum pale yellow to dark brown; katepisternum with black setulae and tapering, dark-brown marking at antero-lateral corner. Legs with coxae, trochanters yellow to pale brown except fore coxa yellow to dark brown; femora brown with one dark-brown, subapical ring; tibia brown; tarsi reddish brown to dark brown. Setulae on legs black. Wing hyaline, pale brown with large brown stigma at branching of R1+2; apical Sc1 slightly beyond base of Rs, Sc2 apically reaching 1/5 of Rs; basal deflection of CuA1 before branching point of M (Fig. 3 ). Halter: stem dull brown; knob bicolor, upper part pale brown to dark brown, lower part white (Fig. 1 ).

Abdomen (Fig. 1 ). Mainly dull brown. Each abdominal segment with one pale yellow ring at posterior margin. Abdomen covered with golden setulae.

Hypopygium dull brown (Figs 4-7 ). Posterior margin of tergite 9 broadly emarginated (Fig. 4 ). Gonocoxite weakly constricted at apex. Gonostylus with apex sharp, base swollen (Figs 4 , 5 ). Paramere with fan-shaped base, very slender apex ending at 5/6 of aedeagus (Figs 4-7 ). Aedeagus forked; ventral mid-protrusion along middle line (Figs 4-7 ).

Female (n = 4): body length 7-8 mm, wing length 8-9 mm.

Female resembling male in head, thorax and wing. Female terminalia dull brown. Cercus yellowish brown, slightly arched dorsally at apex, slender, 3 times longer than wide at base. Hypogynial valve 3.7 times longer than wide at base; lateral margin with triangular, black marking (Figs 8-9 ).

Material examined.

1 male, China: Xinjiang, Habahe, Celebaixiang, 48.08N, 86.331E, elev. 530 m, 2016.VII.9, Jinlong Ren (CAU). 7 males, 2 females, China: Xinjiang, Habahe, Baihabacun, 48.69N, 86.80E, elev. 1170 m, 2016.VII. 12, Jinlong Ren (light trap) (CAU). 12 males, 2 females, China: Xinjiang, Habahe, Baihabacun, 48.67N, 86.80E, elev. 1020 m, 2016.VII.12, Jinlong Ren (CAU). 8 males, 4 females, China: Xinjiang, Habahe, Baihabacun, 48.67N, 86.79E, elev. 1630 m, 2016.VII.12, Jinlong Ren (CAU). 2 males, 3 females, China: Xinjiang, Habahe, Baihabacun, 48.69N, 86.79E, elev. 1170 m, 2016.VII.12, Jinlong Ren (light trap) (CAU). 2 females (CAU), China: Xinjiang, Habahe, Baihabacun, 48.66N, 86.79E, elev. 1730 m, 2016.VII.13, Jinlong Ren (CAU). 1 male, China: Xinjiang, Burqin, Kanas, 48.68N, 86.99E, elev. 1470 m, 2016.VII.16, Jinlong Ren (CAU). 1 male, China: Xinjiang, Burqin, Kanas Lake, 48.74N, 87.01E, elev. 1390 m, 2016.VII.17, Jinlong Ren (CAU). 1 male, China: Xinjiang, Burqin, Kanas, 48.69N, 87.00E, elev. 1330 m, 2016.VII.18, Jinlong Ren (CAU). 2 males, China: Xinjiang, Burqin, Hemu, 48.58N, 87.45E, elev. 1160 m, 2016.VII.21, Jinlong Ren (CAU). 1 female, China: Xinjiang, Burqin, Hemu, 48.57N, 87.43E, elev. 1090 m, 2016.VII.22, Jinlong Ren (light trap) (CAU). 1 male, China: Xinjiang, Burqin, Hemu, 48.56N, 87.44E, elev. 1200 m, 2016.VII.23, Jinlong Ren (CAU).

Distribution.

Armenia, Austria, Azerbaijan, Belarus, Belgium, Bulgaria, China (Xinjiang: Burqin, Hababe), Croatia, Cyprus, Czech Rep., Denmark, Finland, France, Georgia, Germany, Great Britain, Greece, Hungary, Ireland, Italy, Kazakhstan, Kyrgyzstan. Latvia, Lithuania, Macedonia, Mongolia, Morocco, Netherlands, North Caucasus, North Korea, Norway, Pakistan, Poland, Romania, Russia, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Tajikistan, Turkey, Turkey, Ukraine, Uzbekistan.

Remark.

This is the first report of this species from China. The position of Sc relative to Rs and female body color shows the geographic variation. First, specimens from Xinjiang (Burqin, Altay Mountain) have Sc1 slightly beyond basal Rs, Sc2 reaching 1/5 of Rs (Fig. 3 ), similar wing venation with Savchenko’s drawing ( Savchenko 1985: 145, fig. 95.2), whereas specimens from Korea have Sc1 reaching 1/3 of Rs, Sc2 reaching 1/4 of Rs ( Podenas and Podeniene 2017: 17, fig. 25). Moreover, female specimens from Xinjiang have the dark brown sternites, whereas Korean specimens have the yellow sternites ( Podenas and Podeniene 2017:19).

Figures

Figures 1 - 3. Limonia macrostigma, male 1 habitus, lateral view 2 head and thorax, dorsal view 3 right wing. Scale bars: 1.0 mm.

Figures 4 - 7. Limonia macrostigma, male 4 hypopygium, dorsal view 5 hypopygium, ventral view 6 hypopygium, lateral view 7 Aedeagus and paramere. Scale bars: 0.1 mm.

Figures 8 - 9. Limonia macrostigma, female 8 cercus and hypogynial valves, lateral view 9 cercus and hypogynial valves, ventral view. Scale bars: 1.0 mm.