Usana aspergilliformis, 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 : 491-494

Usana aspergilliformis sp. nov.

( Figs 1–4 , 25–36 )

Measurements. Body length (from apex of vertex to tip of forewing): male 5.0– 5.1 mm (n = 2), female 6.3 mm (n = 1); forewing length: male 4.1– 4.1 mm (n = 2, female 5.4 mm (n = 1).

Coloration. Yellow to brown. Head yellow. Vertex with 2 longitudinal dark brown stripes along midline ( Figs 1, 3 , 25 ). Frons with a transverse dark brown marking along the frontoclypeus suture ( Fig. 27 ). Postclypeus with base and apex brown ( Fig. 27 ). Anteclypeus, rostrum and antennae yellowish brown. Genae with a transverse dark brown stripe beneath eyes ( Figs 2, 4 , 26 ). Eyes reddish brown, ocellus pale yellow ( Fig. 26 ). Pronotum yellow with 2 dark brown longitudinal stripes between lateral carinae, lateral and ventral lobes with a longitudinal stripe respectively ( Figs 1–4 , 25 ). Mesonotum brown to dark brown, with lateral, posterior angles and area along lateral carina yellow ( Fig. 25 ). Tegulae with inner half yellow, external half brown ( Fig. 25 ). Forewing brown with costal and claval areas yellow and several small transverse dark brown stripes or scattered markings, especially in the area of clavus ( Figs 1–4 , 28 ). Hindwing pale brown, veins dark brown. Legs and abdomen light yellow.

Head and thorax. Ratio of vertex at posterior margin width to length in midline 2.2. Ratio length of frons in midline to maximum width 1.2, ratio maximum width to width at apex 1.5. Ratio length of postclypeus in midline to length of frons 0.6. Ratio of apical to subapical segment of rostrum 1.5. Ratio length of pronotum in midline to length of vertex 0.7. Mesonotum in midline 7.0 times longer than pronotum, 3.0 times longer than pronotum and vertex combined. Forewing with ratio of length to maximum width 3.1. Hindwing with ratio of length to maximum width 1.9.

Male genitalia. Anal segment in dorsal view ( Fig. 30 ) with ratio length to maximum width 1.4, apical margin distinctly concave ; apex of anal stylet not exceeding apex of anal segment. Pygofer in lateral view ( Fig. 31 ) with dorsal margin distinctly shorter than ventral margin, narrowest part at dorsal fourth, posterior margin with a fingerlike process, of which beneath with a round, broad process with its apex ventrally bent at dorsal third; medioventral process of pygofer in ventral view ( Fig. 32 ) entire, long, narrowing apically, with width of anterior 4.2 times wider than apex, apical margin angularly concave in midline. Genital style straight, slightly narrowing apically, with apex broadly convex, dorsal margin gives rise to 3 stubby bent processes; inner surface near anterior margin with a finger-like process with apical margin truncate, basal 2/3 distinctly longitudinally dehiscent, directed outwards ( Figs 33–34 ). Aedeagus with phallobase, in dorsal view ( Fig. 35 ), with dorsal lobe with apical margin aspergilliform, right lateral margin near middle with a stubby process with some teeth at basal lateral side of apex, directed basad, left lateral margin near middle with an obtuse angle-like process with basal lateral margin serrated; ventral lobe in ventral view ( Fig. 36 ) with both lateral sides distinctly ridged, of which apical 1/3 with several teeth, and subapical surface in middle gives rise to a long process with apical margin roundly convex, directed basad. Each phallic appendage with one big and 2 small apical spines, the small ones at inner side of apex ( Figs 35–36 ).

Type material. Holotype: ♂, CHINA, Guizhou: Ceheng, Zhelou (24°92'N, 105°83'E), scrubland, 26 August 2012, S.-Y. Xu. Paratypes, Guizhou: 1 ♂, 1 ♀, Zhelou (24°92'N, 105°83'E), Ceheng, scrubland, 26 August 2012, W.-B. Zheng.

Etymology. The species name is derived from the Latin word “ aspergilliformis ”, which refers to the dorsal lobe of phallobase in dorsal view ( Fig. 35 ) with apical margin aspergilliform.

Host plant. Alangium platanifolium (Sieb. et Zucc.) Harms.

Distribution. China (Guizhou).

Remarks. Usana aspergilliformis is similar to U. yanonis and U. concava but differs from the latter two in the following: frons with one transverse dark brown marking along the frontoclypeus suture (without marking in U. yanonis and with 2 roundly dark brown near the apex in U. concava ); forewing with several small transverse dark brown stripes especially in area of clavus (without such transverse stripes in U. yanonis and U. concava ).

The host plant information for Usana aspergilliformis presented in this paper was retrieved from the collectors.

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 25 – 36. Usana aspergilliformis sp. nov. 25. Head and thorax, dorsal view; 26. Head, lateral view; 27. Face; 28. Forewing; 29. Hindwing; 30. Anal segment, dorsal view; 31. Male genitalia, lateral view; 32. Pygofer and genital style, ventral view; 33. Left genital style, dorsal view; 34. Left genital style, ventral view; 35. Aedeagus, dorsal view; 36. Aedeagus, ventral view. Scale bars: = 1 mm (Figs 28 – 29); 0.5 mm (Figs 25 – 27, 31 – 32, 35 – 36); 0.2 mm (Figs 30, 33 – 34).