Picromerus Amyot and Serville, 1843

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 : 147-148

Key to the species of Picromerus Amyot and Serville from China

1 Pronotal humeral angle sharp angulated, with a subapical prominence or tooth and same color as the pronotal disc......... 2

- Pronotal humeral angle obtuse angulated, without a subapical prominence or tooth, color different from disc............. 5

2 Connexivum entirely black; the apex of humeral angle with an obvious tooth ( Fig. 23 ); body dorsum black, hardly with yellow spots; membrane passing the end of abdomen slightly; aedeagus with one pair of basolateral conjunctival lobes, proximal branch small, short, membranous; distal branch long, narrow, with sclerotized apex; apical conjunctival lobe short and bifurcate, stretch out from apical part of theca (Fig. 59).................................................... P. griseus

- Connexivum black and yellow, humeral angle slightly bifurcate, posterior branch only a prominence (e.g. Fig. 24 )......... 3

3 The anterolateral margin of pronotum with a broad yellow-white margin, anterior branch of pronotal humeral angle very long and the apex slightly curved ( Fig. 24 ); head above and beneath, anterolateral pronotal submargin, incisures of connexivum and ventral surface of pronotal humeral angles, lateral area of sternum more or less marked with metallic-green shades................................................................................................ P. viridipunctatus

- The anterolateral margin of pronotum without such broad yellow-white margin, nearly same color with other part of pronotum .................................................................................................... 4

4 Buccula relatively narrow, outer margin straight, with 2–3 rows of punctures ( Fig. 13 , arrow noted); lateral sides of the ventral abdomen evenly scattered with finely black spots, not formed into black belts ( Fig. 15 ); paramere slim and long, apex hooked and sharp( Figs. 37 , 52 ); aedeagus with one pair of basolateral conjunctival lobes, proximal branch small, short, membranous; distal branch long, narrow and with sclerotized apex; apical conjunctival lobe long, bifurcate (Fig. 57)............ P. bidens

- Buccula relatively broad, outer margin curved, with 4–6 rows of punctures ( Fig. 14 , as arrow noted); lateral sides of the ventral abdomen with series of black spots, sometimes formed into black belts ( Fig. 16 ,); paramere wide in basal part, apex hooked and digitiform ( Fig. 38 , 53 ); aedeagus with one pair of basolateral conjunctival lobes, proximal branch small, semicircled; distal branch long, narrow and with sclerotized apex; apical conjunctival lobe long and bifurcate, stretch out from apical part of theca obviously (Fig. 58).......................................................................... P. lewisi

5 Head black, center with a broad mesial yellow-brown band, including clypeus and vertex, continuing to base of head; anterolateral pronotal margins thick, with sparse, obtuse tooth; the calli outlined in black, with some black irregular short band radiating backward; dorsal surface of body intumescent, not flat ( Fig. 17 ); humeral angles black, shortly porrect ( Fig. 25 )................................................................................................ P. fasciaticeps

- Head yellowish uniformly; anterolateral pronotal margins relatively thin and with small obtuse teeth; the back margin of calli outlined in black unclearly; dorsal surface of body flat, not intumescent ( Fig. 18 ); humeral angles elevated, pale and long ( Fig. 26 ).................................................................................. P. elevatus sp. nov.

Figures

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 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 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.