Picromerus bidens (Linnaeus, 1758)

Zhao, Qing, Liu, Guoqing & Bu, Wenjun, 2013, A review of the Chinese species of the genus Picromerus Amyot and Serville, with description of a new species (Hemiptera: Heteroptera: Pentatomidae: Asopinae), Zootaxa 3613 (2), pp. 146-164 : 148-149

Picromerus bidens (Linnaeus, 1758)

Figs. 1, 2 , 13, 15 , 19 , 27, 32, 37 , 42, 47, 52 , 57, 62

Cimex bidens Linnaeus, 1758: 443 .

Cimex bilobus Schrank, 1781: 268 . (syn. Schrank, 1782: 277)

Picromerus fuscoannulatus Stål, 1858: 176 . (syn. Kerzhner, 1964: 367)

Picromerus longicollis Jakovlev, 1902: 335 . (syn. Kerzhner, 1964:367, with fuscoannulatus )

Male terminalia: Pygophore ( Figs. 27, 32 , 42, 47 ) with dorsoposterior rim a little concave medially, parandria oblong, ventroposterior rim smooth and a little convex, with a medial notch and long setae, lateroposterior angle round and lower than the notch bottom. Paramere ( Figs. 37 , 52 ) slim and long, apex hooked and sharp, outer margin arched and thickened; inner branch slim, digitiform, outer margin straight; concavity nearly semicircled. Aedeagus (Figs. 57, 62) with one pair of basolateral conjunctival lobes, each divided into two branches: proximal one and distal one. Proximal branch small, short, membranous; distal branch long, narrow and with sclerotized apex. Apical conjunctival lobe long, bifurcate. Median penial plates strongly sclerotized, united in base. Vesica distinctly stretched from the venter of median penial plates.

Measurements (in mm). Body length 11.0–15.0; length of head 2.4–2.8, width across eyes 2.4–2.8, interocular distance 1.4–1.6; length of antennomeres (I) 0.3–0.4: (II) 1.5–1.8: (III) 1.4–1.8: (IV) 1.9–2.1: (V) 1.7–1.9; median length of pronotum 2.6–2.5, humeral width 6.4–9.1; length of scutellum 3.5–4.8, width of scutellum 3.0–4.1.

Specimen examined. CHINA: Heilongjiang: 3 females 1 male, Boli County (45.76N, 130.59E), 27. VII. 1980, Wang leg. ; 1 female 1 male, same data as above except collector, Leyi Zheng leg. ; 1 male, Mao’er Mt. (39.08N, 117.20E), Shangzhi City, 16. VIII. 1957, collector unknown ; 1 female, same place as above, 6. VII. 1994, collector unknown; 1 male, Jingbohu (45.28N, 127.518E), Ning’an City, 23. VII. 2003, Weibing Zhu leg. ; 2 males, same place as above, 1. VIII. 2003, Ying Tian leg.; 1 male, same data as above, except collect date 9. VIII. 2003 ; 1 male, same place as above, 5. VIII. 2003, Jianhua Ding leg.; 1 male, same data as above except collector, Weibing Zhu leg. ; 2 females 2 males, same data as above except collect date, 11. VIII. 2003, collector unknown ; 3 males, same place as above, 13.VIII. 2003, Xiaoming Li leg.; 1 male, same data as above except collector, Jianhua Ding leg. ; 1 female 2 males, same data as above except collector, Ying Tian leg. ; 1 female, same place as above, 14. VIII. 2003, Xiaoming Li leg.; 1 female, same place as above, 10. VIII. 2003, Wenjun Bu and Jun Li leg.; 1 male, Weihu Mt. (44.83N, 129.15E), Hengdaohezi Village, Hailin City , Mudanjiang City , 29. VII. 2003, Xin Yu leg. ; 3 females 1 male, Xiaobeihu Forest Farm (44.83N, 129.153E), Ning’an City, 4. VIII. 2003, Weibing Zhu leg. ; 1 female, same data as above except collector, Xiaoming Li leg. ; 1 female, same data as above except collect date, 5. VIII. 2003 leg .; 1 female, the same place as above, 4. VIII. 2003, Ying Tian leg.; 1 female, Wuying National Forest Park (48.24N, 129.21E), Yichun City, 23. VII. 1978, collector unknown ; 1 female, Jiamusi City (46.80N, 130.32E), 15. V. 1957, collector unknown ; 1 female, Pubu Village (44.90N, 127.81E), Ning’ an City , 7. VIII. 2003, Yunling Ke leg. ; 1 female, same data as above, except collector, Weibing Zhu leg. ; 1 male, same place as above, 11. VIII. 2003, Yunling Ke leg.; Inner Mongolia: 1 female, 1 male, Yaobazigou (38.59N, 105.65E), alt. 2080m, Alxa Meng Helanshan Nature Reserve , 11. VIII. 2010, Haixin Tang leg. ; 1 male, same place as above, 5. VIII. 2003, Jianhua Ding leg.; 1 male, Mochi North Temple (39.01N, 106.05E), alt. 2069m, Alxa Meng Helanshan Nature Reserve , 13. VIII. 2010, Ying Cui leg. ; 1 female 2 males, same data as above except collector, Haixin Tang leg. ; 1 female, 1 male, Xuelingzi (38.71N, 105.83E), alt. 2325m, Alxa Meng Helanshan Nature Reserve , 11. VIII. 2010, Ying Cui leg. ; 1 female 1 male, Hailar City (49.23N, 119.73E), 9. VIII. 1981, Shuzhi Ren leg. ; 1 female 1 male, same data as above except collector, Leyi Zheng leg. ; 1 female, same place as above, 1. VIII. 1981, Huanguang Zou leg.; 1 female, Qiqiling County (51.7N, 124.2E), 16. VIII. 1981, Huanguang Zou leg. ; 1 female, Alihe County (51.15N, 123.60E), 14. VIII. 1981, Shuzhi Ren leg. ; 1 female, Gulian Forest Farm (52.96N, 122.36E), Mohe County, 9. VII. 1984, collector unknown ; 1 female, Dailing County (47.05N, 129.02E), Yichun City, 28. VIII. 1957, collector unknown ; 1 female, Langxiang Village (46.95N, 128.87E), Tieli City, 22. VIII. 1963, collector unknown . Liaoning: 1 female, Yingkou City (40.68N, 122.23E), 2. X. 1986, Jingke Li leg. Ningxia: 1 male, Xiaokouzi (38.61N, 105.93E), Helanshan, Yinchuan City , 27. VII. 1987, collector unknown .

Distribution. Rider and Zheng (2002) provided distributional information in China (Anhui, Hebei, Heilongjiang, Jilin, Liaoning, Inner Mongolia). Wide spread Palaearctic species, also introduced to northeastern North American ( Thomas, 1992).

Remarks. This species is very common in Europe, and extends Canada and America, but only distributed in the north of China, for example Heilongjiang, Liaoning and Inner Mongolia. The apex of humeral angle sharp, bifurcate or with a small prominence at the posterior of subapex ( Fig. 19 ). Two lateral sides of abdominal venter with evenly shallow punctures, not formed into black belt ( Fig. 15 ), but in P. lewisi lateral sides with deep black punctures, and formed into black belts ( Fig. 16 ). Rostrum not passing metacoxae. Sternite VII with a big black spot in the center.

Figures

FIGURES 1–4. Habitus photographs of Picromerus species. 1–2 P. bidens (1 dorsal view; 2 ventral view). 3–4 P. lewisi (3 dorsal view; 4 ventral view). Bar = 5 mm.

FIGURES 13–18. 13–14 Lateral side of buccula (arrows noted) (13 P. bidens; 14 P. lewisi); 15– 16 Ventral abdomen (15 P. bidens; 16 P.lewisi); 17–18 Lateral view (17 P. fasciaticeps; 18 P. elevatus sp. nov.)

FIGURES 19–26. Pronotal humeral angle of Picromerus. (19 P. bidens; 20–22 P.lewisi; 23 P.griseus; 24 P. viridipunctatus; 25 P. fasciaticeps; 26 P. elevatus sp. nov.)

FIGURES 27–41. 27–31 Photos of pygophoral dorsal view (27 P. bidens; 28 P.lewisi; 29 P.griseus; 30 P. viridipunctatus; 31 P. elevatus sp. nov.); 32–36 Photos of pygophoral ventral view (32 P. bidens; 33 P.lewisi; 34 P.griseus; 35 P. viridipunctatus; 36 P. elevatus sp. nov.); 37–41 Photos of paramere (37 P. bidens; 38 P. lewisi; 39 P. griseus; 40 P. viridipunctatus; 41 P. elevatus sp. nov.). Bars = 0.2mm.

FIGURES 42–56. 42–46 Outline of pygophoral dorsal view (42 P. bidens; 43 P.lewisi; 44 P.griseus; 45 P. viridipunctatus; 46 P. elevatus sp. nov.); 47–51 Outline of pygophoral ventral view (47 P. bidens; 48 P.lewisi; 49 P.griseus; 50 P. viridipunctatus; 51 P. elevatus sp. nov.); 52–56 Outline of paramere (52 P. bidens; 53 P. lewisi; 54 P. griseus; 55 P. viridipunctatus; 56 P. elevatus sp. nov.). (dp. r. = dorsoposterior rim; lp. a. = lateroposterior angle; m. n. = medial notch; o. m. = outer margin; p. = parandria; i. b. = inner branch; vp. r. = ventroposterior rim). Bars = 0.2mm.