Acrorrhinium amblyangulum, Zhang, Xu & Liu, Guo-Qing, 2010

Zhang, Xu & Liu, Guo-Qing, 2010, The hallodapine plant bug genus Acrorrhinium Noualhier, 1895 from China (Hemiptera: Heteroptera: Miridae: Phylinae), Zootaxa 2524, pp. 24-32 : 26-27

Acrorrhinium amblyangulum sp. nov.

( Figs. 1, 2 , 8 , 12–15 )

Type specimens: Holotype: male, CHINA: Wanning County (18°48'N, 110°24'E), Hainan Province, alt. 2200m, 26. VII. 2008, light trap, Zhong-hua Fan leg.. Paratype: 1 female, CHINA: Wenchang City (19°36'N, 110°45'E), Hainan Province, 29. VII. 2008, light trap, Zhong-hua Fan leg..

Diagnosis: Recognized by the weakly convex exterior margin of the hemelytra, the deep yellowish brown body with irregular pale spots, the white-yellow strap on the middle of clavus, the black hemelytral membrane with irregular dirty yellow spots posteriorly, and the distinctly long and twisted vesica with large membrane apically. It is most similar in body appearance to A. hongkong Schuh , but can be separated from the latter by the relatively deep coloration of dorsum, and the more complex, twisted vesica with apex surrounded by cylindrical membrane.

Description: Male ( Fig. 1 ): Macropterous, weakly ant-mimetic, medium-sized.

Coloration: General coloration deep yellow-brown with many irregular pale spots; vertex and spiniform frons brown; clypeus and maxillary plate reddish brown; mandibular plate and buccula dirty brown; labial segment I deep red-brown and extremely shining, segment II and III dirty yellow, segment IV dark brown; antenna brown with segment I dirty yellow; pronotum, mesoscutum exposed yellow-brown, scutellum and hemelytra brown; clavus with skew white-yellow strap mesially, corium with skew dark strap mesially, not reaching clavus; cuneus brown; membrane black with irregular dirty yellow spots; procoxae and femora brown, meso- and meta-coxae white-yellow; tibiae reddish brown; abdomen dark brown.

Vestiture: Dorsum covered with two types of setae: the decumbent, shining sericeous setae and the suberect or declined yellow-brown simple setae, both types short and sparse; abdomen covered with decumbent simple setae.

Structure: Head ( Fig. 8 ): Rounded in dorsal view; vertex flattened, mesially with complete longitudinal sulcus, posterior margin necklike, not forming typical carina; spiniform frons blunt and rounded apically; clypeus protuberant; labium reaching abdominal segment III~IV, labial segment I weakly enlarged; eyes removed from anterior margin of pronotum by distance equal to about 1/3 diameter of an eye; antenna long, length of segment I subequal to 4/5 of head width, segment II straight. Thorax: Pronotum trapeziform, weakly declined anteriorly, anterior and posterior lobes finely demarcated, collar thick; mesoscutum exposed rather broad, subequal to 2/3 length of scutellum; scutellum convex in the form of a rounded hump mesially; exterior margin of hemelytra weakly constricted in male and slightly convex posteriorly in female; cuneus broadly triangular, declined; femora stout, weakly flattened, tibiae cylindrical, straight and extremely long, just weakly less than the length of body; claws stout, curved, length of tarsal segment III subequal to that of segment I and II. Abdomen: Stout, broad, constricted basally.

Male genitalia ( Figs. 12–15 ): Vesica distinctly long and twisted with large cylindrical membrane apically, secondary gonopore well developed, situated near apex of vesica ( Fig. 12 ); left paramere boat-shaped ( Fig. 13 ); right paramere extremely small and leaflike ( Fig. 14 ), phallotheca weakly curved ( Fig. 15 ).

Female ( Fig. 2 ): Macropterous, body surface similar to male, dorsal coloration weakly darkened, exterior margin of hemelytra weakly convex.

Etymology. Named for the relatively small and blunt spiniform frons.

Distribution. China (Hainan).

Figures

FIGURES 1 – 7. Habitus views of Acrorrhinium spp. 1. amblyangulum (male); 2. amblyangulum (female); 3. dolichantennatum (male); 4. dolichantennatum (female); 5. hongkong (male); 6. hongkong (female); 7. inexpectatum (male)

FIGURES 8 – 11. Lateral view of head of Acrorrhinium spp. 8. amblyangulum (male); 9. dolichantennatum (male); 10. hongkong (male); 11. inexpectatum (male)

FIGURES 12 – 15. Male genitalia of Acrorrhinium amblyangulum: 12. Vesica; 13. Left paramere; 14. Right paramere; 15. Phallotheca