Nysius helveticus ( Herrich-Schaeffer, 1850 )

Ge, Xinyu & Li, Junlan, 2019, Review of the genus Nysius Dallas from Mongolian Plateau (Hemiptera: Heteroptera: Orsillidae), Zootaxa 4560 (1), pp. 171-183 : 176

Nysius helveticus ( Herrich-Schaeffer, 1850)

( Fig. 3 )

Cymus helveticus Herrich-Schaeffer,1850: 203 .

Nysius helveticus: Zheng & Zou, 1981: 28 .

Diagnosis: The body color is flavescent or testaceous. Nysius helveticus is distinguished from other species by scutellum with obvious flavescent carina, corium nearly translucent, and lateral margin of corium not conspicuously arched. Inner projection of paramere ( Fig. 12 ) blunt. Pygophore ( Fig. 17 ), spermatheca ( Fig. 22 ) and ejaculatory reservoir ( Fig. 27 ) as shown in the figures.

Measurements. Male. (n=10): Total length: 4.80–5.50 (5.15); head length: 0.85–1.00 (0.92); head width: 1.10–1.20 (1.14); interocular space: 0.65–0.71 (0.68); Antennal segments:? 0.33–0.35 (0.34),? 0.71–0.76 (0.73),? 0.51–0.55 (0.54),? 0.62–0.67 (0.66); pronotum length: 0.94–1.00 (0.97); pronotum width: 1.40–1.60 (1.54); scutellum length: 0.53–0.70 (0.61); scutellum width: 0.71–0.93 (0.81); claval commissure length: 0.48–0.52 (0.50); abdomen length: 2.60–2.90 (2.76); abdominal width: 0.81–1.20 (0.96).

Female. (n=10): Total length: 4.90–5.80 (5.45); head length: 0.90–1.10 (1.05); head width: 1.15–1.35 (1.22); interocular space: 0.69–0.81 (0.79); Antennal segments:? 0.33–0.36 (0.34),? 0.72–0.77 (0.74),? 0.51–0.55 (0.54),? 0.63–0.69 (0.67); pronotum length: 0.98–1.10 (1.04); pronotum width: 1.55–1.70 (1.61); scutellum length: 0.60– 0.76 (0.69); scutellum width: 0.74–0.96 (0.85); claval commissure length: 0.49–0.53 (0.51); abdomen length: 2.70– 3.30 (3.12); abdominal width: 1.00–1.70 (1.53).

Material examined. INNER MONGOLIA: Alxa League: Alxayouqi , 3♀♀, 30-VII-1984 , Nonnaizab; Ordos City: 1♀, Dongsheng District , 17-VIII -1988 . Xilingol League: Taipusiqi , 1♂, 8-VIII-1987 ; Zhenglanqi, Sanggendalai Town , 2♀♀, 27-VII-1987 . Chifeng city: Balinyouqi, Hanshan forest , 4♀♀ 3♂♂, 7-VII-1982 , Nonnaizab ; 9♀♀ 8♂♂, 15-VII-2017 , Ge Xinyu. Hinggan League: Aershan City , 2♀♀, 27-VII-1984 ; 3♀♀, 12- VIII-1990 ; 1♂, 31-VII-2007; Keerqinyouyizhongqi , 2♂♂, 4-VIII-1989 ; Keerqinyouyiqianqi , 1♂, 27-VII-1984 ; Hulunbuir City: Molidawa daurzizhiqi, 1♀, 16-VII-1981 ; Ewenkezizhiqi , 4♀♀ 1♂, 21-VII-1986 , Nonnaizab; Erguna City , 2♂♂, 27-VII-1985 ; Hulunbuir City , 1♂, 26-VII-1980 ; Xinbaerhuzuoqi , 5♀♀ 6♂♂, 28-VII-2007 , Li Hongwei; Zhalantun City , 1♀, 2-VII-1982 . MONGOLIA: Uvs aimag: Ualchiusum , 1♀, 12-VIII-1 975. Arkhangai aimag: Tuvshruulekh , 2♀♀ 2♂♂, 21-VII-1970 ; 3♀♀, 26-VIII-1 980. Selenge aimag: shaamar, 1♂, 26-VII-1989 ; 1♀, 6-VII-1982 ; Shariin gol, 3♀♀, 2-VIII-1975 ; Bayan gol sum, 2♀♀ 1♂, 7-VIII-1975 . Dornod aimag: Derkhiin tsagaan ovoo, Bayanburd 60km, 8♀♀ 6♂♂; Nomrog gol, 1♀, 8-VIII-1976 .

Distribution. Inner Mongolia, China: Alex League (Alexyouqi), Ordos City (Dongsheng Distric), Xilingol League (Taipusiqi, Zhenglanqi, Sanggendalai), Chifeng City(Balinyouqi, alukeerqinqi), Hinggan League (Aershan City, Keerqinyouyizhongqi, Keerqinyouyiqianqi), Hulunbuir City (Molidawa daurzizhiqi, Ewenkezizhiqi, Erguna City, Hulunbuir City, Xinbaerhuzuoqi, Zhalantun City, Hailaer City); Mongolia: Uvs, Arkhangai, Selenge, Dornod, Khentii, Sukhbaatar, Hovd; Elsewhere: China (Beijing), Asia, Europe.

Figures

FIGURES 1–5. Adult dorsal habitus: Fig. 1, N. ericae ericae; Fig. 2, N. eximius; Fig. 3, N. helveticus; Fig. 4, N. senecionis; Fig. 5, N. thymi thymi.(scale bar = 1.0mm).

FIGURES 10–19. Figs. 10–14. Right Parameres: Fig. 10, N. ericae ericae; Fig. 11, N. eximius; Fig. 12, N. helveticus; Fig. 13, N. senecionis; Fig. 14, N. thymi thymi; Figs. 15–19. Pygophore: Fig.15, N. ericae ericae; Fig. 16, N. eximius; Fig. 17, N. helveticus; Fig. 18, N. senecionis; Fig. 19, N. thymi thymi. (scale bar = 0.10mm).

FIGURES 20–30. Figs. 20–24. Spermatheca: Fig. 20, N. ericae ericae; Fig. 21, N. eximius; Fig. 22, N. helveticus; Fig. 23, N. senecionis; Fig. 24, N. thymi thymi; Figs. 25–28,30. Ejaculatory reservoir and duct: Fig. 25, N. ericae ericae; Fig. 26, N. eximius; Fig. 27, N. helveticus; Fig. 28, N. senecionis; Fig. 29, N. senecionis ejaculatory reservoir; Fig.30, N. thymi thymi. (scale bar = 0.10mm).