Acrorrhinium dolichantennatum, 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 : 28-30

Acrorrhinium dolichantennatum sp. nov.

( Figs. 3, 4 , 9 , 16–19 )

Type specimens: Holotype: male, CHINA: Linan County (30°14'N, 119°43'E), Zhejiang Province, alt. 900m, 13. VIII. 2007, light trap, Geng-ping Zhu and Wei-bing Zhu leg.. Paratype: 1 female, same data as holotype.

Diagnosis: Recognized by the large and elongate body appearance, the deep brown body and the rather mottled hemelytra, the length of antenna more than that of the body, the distinctly long antennal segment III subequal to the length of segment II, and the male genitalia; this species could be easily distinguished from its congeners by the distinctive elongate body and the extremely long and twisted vesica. The shape of vesica is similar to that of A. amblyangulum sp. nov., but can be separated from the latter by the shape of apical membrane on the vesica.

Description: Male ( Fig. 3 ): Macropterous, relatively large-sized.

Coloration: Body generally deep brown and mottled with irregular yellow spots; head yellow-brown; labium reddish brown with apex darkened; antenna dark brown, segment I with two tiny dirty yellow spots; corium with obscure, oblique dark strap mesially, not reaching clavus; cuneus deep brown with proximal margin dirty yellow; legs deep brown except meso- and meta-coxae white-yellow; abdomen reddish to dark brown.

Vestiture: Dorsum covered with short, declined, dark brown simple setae and decumbent, shining sericeous setae, both types sparse; abdomen covered with declined simple setae.

Structure: Head ( Fig. 9 ): Rounded in dorsal view; vertex smooth, weakly convex, mesially with complete longitudinal sulcus, posterior margin of vertex necklike, weakly convex; spiniform frons moderate-sized; clypeus rounded, nearly vertical; mandibular plate small, maxillary plate flattened, smooth; buccula slender; labium reaching abdominal segment III; antenna long, more than length of body, antennal segment I slightly enlarged, subequal to segment IV in length, segment II and III subequal in length and diameter; eyes protuberant laterally, removed from anterior margin of pronotum by distance equal to about the diameter of basal apex of segment II. Thorax: Pronotum trapeziform, weakly declined anteriorly, anterior and posterior lobes finely demarcated, collar thick, calli slightly convex; length of mesoscutum exposed equal to 1/2 that of scutellum; scutellum convex mesially; hemelytra distinctly elongate, exterior margin straight; cuneus weakly declined, broadly triangular; veins of membrane indistinct; femora stout and weakly flattened, tibiae cylindrical and straight, with two rows of deep brown short teeth; length of tarsal segment I and II weakly less than that of segment III. Abdomen: Relatively stout and broad, its basal segments not being obviously constricted.

Male genitalia ( Figs. 16–19 ): Vesica distinctly long and twisted with distinctive shape of apical membrane, secondary gonopore well developed, situated near apex of vesica ( Fig. 16 ); left paramere boatshaped, hypophysis elongate, sensory lobe blunt apically ( Fig. 17 ); right paramere extremely small, leaflike ( Fig. 18 ); phallotheca enlarged, distinctly curved ( Fig. 19 ).

Female ( Fig. 4 ): Macropterous. Body size, surface and coloration similar to male.

Etymology. Named for its distinctly long antenna.

Distribution. China (Zhejiang).

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 16 – 19. Male genitalia of Acrorrhinium dolichantennatum: 16. Vesica; 17. Left paramere; 18. Right paramere; 19. Phallotheca