Six new species of the planthopper genus Usana Distant, 1906 (Hemiptera: Fulgoromorpha: Achilidae) from China Author Long, Jian-Kun Author Yang, Lin Author Chen, Xiang-Sheng text Zootaxa 2015 3947 4 489 507 journal article 10.11646/zootaxa.3947.4.2 07c18b01-cb5c-42ce-9c6e-1ad58c4ab13b 1175-5326 239136 51F5E38A-C7CC-4AB2-9630-099405A1D619 Usana concava sp. nov. ( Figs 5–6 , 37–48 ) Measurements. Body length (from apex of vertex to tip of forewing): male 6.6 mm (n = 1); forewing length: male 5.6 mm (n = 1). Coloration. Yellowish brown to brown. Vertex along midline and lateral margins pale yellowish brown ( Figs 5 , 37 ). Frons yellowish brown with 2 rounded dark brown markings near the apex ( Fig. 39 ). Clypeus, rostrum, genae and antennae generally pale yellowish brown. Eyes reddish brown, ocellus pale yellow ( Fig. 38 ). Pronotum pale yellowish brown with 2 dark brown longitudinal stripes between lateral carinae, 3 dark brown longitudinal stripes at each lateral lobe and a dark brown longitudinal strips at each ventral lobe ( Figs 5–6 , 37 ). Mesonotum pale yellowish brown with 2 brown longitudinal stripes between lateral carinae and 2 brown longitudinal stripes outside each lateral carina ( Figs 5 , 37 ). Tegula yellowish brown with pale yellow along inner lateral margin ( Fig. 37 ). Forewing brown with a dark marking respectively at the base of vein Cu1, near base of vein Cu1b, near apex of vein PCu and each apical cell along apical margin, all veins pale yellowish brown to yellowish brown ( Figs 5–6 , 40 ). Hindwing pale brown, veins brown. Legs pale yellowish brown and abdomen yellowish brown. Head and thorax. Ratio of vertex at posterior margin width to length in midline 2.0. Ratio length of frons in midline to maximum width 1.2, ratio maximum width to width at apex 1.6. Ratio length of postclypeus in midline to length of frons 0.7. Ratio of apical to subapical segment of rostrum 1.6. Ratio length of pronotum in midline to length of vertex 0.7. Mesonotum in midline 6.8 times longer than pronotum, 2.7 times longer than pronotum and vertex combined. Forewing with ratio of length to maximum width 3.2. Hindwing with ratio of length to maximum width 1.9. Male genitalia. Anal segment in dorsal view ( Fig. 42 ) bulb-like, with apical margin with a small V-shaped notch in middle, ratio length to maximum width 1.4; anal stylet large, with apex exceeding apex of anal segment. Pygofer in lateral view ( Fig. 43 ) with dorsal margin slightly shorter than ventral margin, anterior margin distinctly concave in middle, posterior margin in middle distinctly wavelike and convex, above with a finger-like process with a round, broad process beneath; medioventral process of pygofer in ventral view ( Fig. 44 ) with apical 1/3 divided into 2 branches. Genital style with apex roundly convex, dorsal margin gives rise to 2 large sharp processes and a small blunt process; inner surface near anterior margin with a bent finger-like process, directed outwards ( Figs 45–46 ). Aedeagus with phallobase slightly constricted in middle ( Figs 47–48 ), dorsal lobe in dorsal view ( Fig. 47 ) with apical margin incised in middle, lateral margins with apical 1/2 distinctly rolled-up, making middle area longitudinally concave ; ventral lobe in ventral view ( Fig. 48 ) with both lateral sides from base to subapical distinctly ridged, with many scattered teeth, and subapical surface in middle gives rise to a long process with its basal 1/3 slightly narrow and apical margin roundly convex, directed basad; right lateral lobe from middle to subbasal much more sclerotized, the surface of which has several teeth. Phallic appendages with apexes distinctly intumescent, especially the left one, with some small spines interspersed on its outer apical surface ( Fig. 48 ). FIGURES 37–48. Usana concava sp. nov. 37. Head and thorax, dorsal view; 38. Head, lateral view; 39. Face; 40. Forewing; 41. Hindwing; 42. Anal segment, dorsal view; 43. Male genitalia, lateral view; 44. Pygofer and genital style, ventral view; 45. Left genital style, dorsal view; 46. Left genital style, ventral view; 47. Aedeagus, dorsal view; 48. Aedeagus, ventral view. Scale bars: = 1 mm (Figs 40 – 41); 0.5 mm (Figs 37 – 39, 43 – 44, 47 – 48); 0.2 mm (Figs 42, 45 – 46). Type material. Holotype : ♂, CHINA , Yunnan : Lüchun, Huanglianshan National Natural Reserve ( 22°88'N , 102°25'E ), tropical montane rain forest, 3–4 August 2012 , Z.-M. Chang. Etymology. The species name is derived from the Latin word “ concavus ”, which refers to the aedeagus with phallobase in dorsal view with dorsal lobe distinctly concave ( Fig. 47 ). Host plant. Unknown. Distribution. China (Yunnan). Remarks. Usana concava is similar to U. yanonis but differs from the latter in: frons with 2 rounded markings near the apex (without any marking in U. yanonis ); lateral lobe of pronotum in dorsal view with 3 longitudinal dark brown stripes (without stripe in U. yanonis ); genae without a dark brown marking beneath antennae (with a dark brown marking beneath antennae in U. yanonis ).