Usana congjiangensis, Long, Jian-Kun, Yang, Lin & Chen, Xiang-Sheng, 2015

Long, Jian-Kun, Yang, Lin & Chen, Xiang-Sheng, 2015, Six new species of the planthopper genus Usana Distant, 1906 (Hemiptera: Fulgoromorpha: Achilidae) from China, Zootaxa 3947 (4), pp. 489-507 : 496-498

Usana congjiangensis sp. nov.

( Figs 7–8 , 49–60 )

Measurements. Body length (from apex of vertex to tip of forewing): male 5.3 mm (n = 1); forewing length: male 4.3 mm (n = 1).

Coloration. Yellow to brown. Head yellow. Genae with a dark brown marking beneath antennae ( Figs 8 , 50 ). Rostrum yellowish brown, with apex brown. Eyes reddish brown, ocellus pale yellow ( Fig. 50 ). Thorax yellow in dorsal view ( Figs 7 , 49 ) with a broad longitudinal dark brown stripe behind eyes. Tegula yellow. Forewing ( Figs 7– 8 , 52 ) yellowish brown with areas along costal margin, claval base and apex pale yellowish brown, each apical cell between veins Sc2 and Cu1a with an apical dark brown marking. Hindwing pale brown, veins brown. Legs yellow to pale yellowish brown, and abdomen pale yellowish brown.

Head and thorax. Ratio of vertex at posterior margin width to length in midline 1.5. Ratio length of frons in midline to maximum width 1.5, ratio maximum width to width at apex 1.6. Ratio length of postclypeus in midline to length of frons 0.5. Ratio of apical to subapical segment of rostrum 1.7. Ratio length of pronotum in midline to length of vertex 0.7. Mesonotum in midline 6.5 times longer than pronotum, 2.6 times longer than pronotum and vertex combined. Forewing with ratio of length to maximum width 2.7. Hindwing with ratio of length to maximum width 1.8.

Male genitalia. Anal segment in dorsal view ( Fig. 54 ) subrectangular with apical margin shallowly concave in middle, ratio length to maximum width 1.3; anal stylet with apex just not exceeding apex of anal segment; in lateral view ( Fig. 55 ) with apical 2/3 distinctly slender, finger-like, and with apical half bent ventrally. Pygofer in lateral view ( Fig. 55 ) with dorsal margin slightly shorter than ventral margin, anterior margin broadly concave at dorsal 2/ 5 distinctly, posterior margin truncate with inner side posteriad extending a broad process, of which apical half abruptly constricted, then narrowing apically; medioventral process of pygofer in ventral view ( Fig. 56 ) distinctly broadened at apical 1/3, then narrowing apically, apical margin in middle concave , reaching apical 1/4. Genital style with apical margin broadly convex, apical half distinctly narrow, dorsal margin gives rise to a blunt and 2 sharp processes; inner surface near anterior margin with a finger-like process with its basal 2/3 longitudinally dehiscent, and apical margin subtruncate, directed outwards ( Figs 57–58 ). Aedeagus with phallobase in dorsal view ( Fig. 59 ) with dorsal lobe with apical margin broadly convex, each lateral side with a process subapically, directed basad, left lateral lobe with a short subangular process at subapex, directed outwards; ventral lobe in ventral view ( Fig. 60 ) with inner margins of lateral sides ventrally ridgy from apical 1/3 to base, which a longitudinal group of teeth distributed near the middle, subapical surface in middle gives rise to a long process with its apical margin broadly convex, directed basad. Phallic appendage with an apical spine, and surface of apex with dense small teeth ( Fig. 59 ).

Type material. Holotype: ♂, CHINA, Guizhou: Congjiang, Yueliangwan (25°71'N, 108°73'E), scrubland, 9– 20 July 2006, Y. Tang.

Etymology. The specific name refers to the type locality, Congjiang County, Guizhou Province, China.

Host plant. Unknown.

Distribution. China (Guizhou).

Remarks. U. congjiangensis distinctly differs from other nine species in: thorax in dorsal view yellow with a broad longitudinal dark brown stripe behind eyes (without such coloration in other nine species); forewing yellowish brown, base and apex of clavus pale yellowish brown, and each apical cell between vein Sc2 and Cu1a with an apical dark brown marking respectively (without such coloration in other nine species).

Figures

FIGURES 1 – 24. Habitus (dorsal and lateral views): 1 – 2. Usana aspergilliformis sp. nov. (♂); 3 – 4. Usana aspergilliformis sp. nov. (♀); 5 – 6. Usana concava sp. nov. (♂); 7 – 8. Usana congjiangensis sp. nov. (♂); 9 – 10. Usana fissura sp. nov. (♂); 11 – 12. Usana fissura sp. nov. (♀); 13 – 14. Usana lineolalis Distant, 1906 (♂); 15 – 16. Usana lineolalis Distant, 1906 (♀); 17 – 18. Usana oblongincisa sp. nov. (♂); 19 – 20. Usana oblongincisa sp. nov. (♀); 21 – 22. Usana unispina sp. nov. (♂); 23 – 24. Usana unispina sp. nov. (♀).

FIGURES 49 – 60. Usana congjiangensis sp. nov. 49. Head and thorax, dorsal view; 50. Head, lateral view; 51. Face; 52. Forewing; 53. Hindwing; 54. Anal segment, dorsal view; 55. Male genitalia, lateral view; 56. Pygofer and genital style, ventral view; 57. Left genital style, dorsal view; 58. Left genital style, ventral view; 59. Aedeagus, dorsal view; 60. Aedeagus, ventral view. Scale bars: = 1 mm (Figs 52 – 53); 0.5 mm (Figs 49 – 51, 55 – 56, 59 – 60); 0.2 mm (Figs 54, 57 – 58).