Usana oblongincisa Long, Yang & Chen, 2015, sp. nov.
Creators: name: Long, Jian-Kun
name: Yang, Lin
name: Chen, Xiang-Sheng
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Achilidae
Usana
Usana oblongincisa

description: Usana oblongincisa sp. nov.
(Figs 17–20, 85–96)
Measurements. Body length (from apex of vertex to tip of forewing): male 5.0–6.0 mm (n = 50), female 5.8–6.5 mm (n = 22); forewing length: male 4.1–5.1 mm (n = 50), female 4.7–5.5 mm (n = 22).
Coloration. Yellow to yellowish brown. Head, thorax and abdomen yellow. Eyes yellow to reddish brown, ocellus yellowish white (Fig. 86). Pronotum with ventral lobe with a dark brown spot (Figs 18, 20, 85). Forewing yellowish brown with a black marking at base, costal margin from its basal 1/5 to basal 1/3 of second costal cell with a longitudinal pale yellow stripe; clavus from its subbase to subapex with another one longitudinal pale yellow stripe between vein PCu and A2; each apical cell along apical margin with a dark marking between veins R1 and Cu1a (Figs 17–20, 88). Hindwing pale brown, veins brown. Legs yellowish brown to pale yellow.
Head and thorax. Ratio of vertex at posterior margin width to length in midline 1.6. Ratio length of frons in midline to maximum width 1.1, 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 1.8. Ratio length of pronotum in midline to length of vertex 0.6. Mesonotum in midline 6.3 times longer than pronotum, 2.3 times longer than pronotum and vertex combined. Forewing with ratio of length to maximum width 3.3. Hindwing with ratio of length to maximum width 1.8.
Male genitalia. Anal segment in dorsal view (Fig. 90) subelliptic with apical margin roundly concave in middle, basal margin rectangularly concave, ratio length to maximum width 1.2; anal stylet short with apex distinctly not exceeding apex of anal segment. Pygofer in lateral view (Fig. 91) with dorsal margin shorter than ventral margin, anterior margin broadly concave in middle, posterior margin slightly sinuate with a subtriangular process at dorsal 1/3; medioventral process of pygofer in ventral view (Fig. 92) entire, with subapex suddenly expanded, then narrowing apically, apical margin in middle incised as bursiform. Genital style with apical half straight, apex roundly convex, basal half about 2 times wider than the apical half, dorsal margin gives rise to 2 large sharp processes and a short, larger blunt process; inner surface near anterior margin with a slender finger-like process, directed outwards (Figs 93–94). Aedeagus with phallobase in dorsal view (Fig. 95) with dorsal lobe with apical margin slightly sinuate and concave in middle, each side of apex respectively with a bent lateroapical process with its apical margin roundly convex, directed basad, the left one slender and long, the right one large and short; ventral lobe in ventral view (Fig. 96) with both sides at subapex abruptly ridged, hence extending along lateral margins to basal 1/3, the left side becoming a much longer finger-like process, with the surface of its apical half with some teeth, the right side with a few teeth near its base and apex, a long process gives rise to middle of subapex, with its apical margin roundly convex, directed basad; left lateral lobe near subapex with a short process with its apical margin roundly convex, and right lateral lobe at apical 1/3 with a broad obtuse process (Figs 95–96). Apex of phallic appendage with one big spine and many small teeth (Fig. 95).
Type material. Holotype: ♂, CHINA, Guangxi: Chongzuo, Nonggang National Natural Reserve (22°30'N, 106°58'E), Karst scrubland, 8 May 2012, light trap, Z.-H. Fan. Paratypes, Guangxi: 1 ♂, 1 ♀, same data as holotype; 5 ♂♂, 3 ♀♀, Nonggang National Natural Reserve (22°30'N, 106°58'E), Karst scrubland, 6–8 May 2012, H. Li (4 ♂♂, 2 ♀♀), N.-N. Yang (1 ♂), X.-F. Yu (1 ♀); 1 ♂, Longzhou, Shiwandashan National Forest Park (21°54'N, 107°54'E), north tropical monsoon forest, 3–4 May 2012, Z.-H. Fan. Guizhou: 32 ♂♂, 13 ♀♀, Zhelou (24°92'N, 105°83'E), Ceheng, scrubland, 26 August 2012, J.-K. Long (16 ♂♂, 4 ♀♀), W.-B. Zheng (6 ♂♂, 5 ♀♀), S.-Y. Xu (10 ♂♂, 4 ♀♀); 1 ♂, Dayi (25°21'N, 106°06'E), Wangmo, scrubland, 21–23 August 2012, J.-K. Long. Hainan: 8 ♂♂, 6 ♀♀, Jianfengling National Natural Reserve (18°41'N, 108°48'E), scrubland, 5–6 April 2013, J.- K. Long, Y.-B. Zhang and J.-C. Xing.
Etymology. The species name is derived from the Latin words “ oblong ” and “ incisus ”, which refer to the anal segment in dorsal view with basal margin rectangularly concave (Fig. 90).
Host plant. Alangium platanifolium (Sieb. et Zucc.) Harms.
Distribution. China (Guangxi, Guizhou, Hainan).
Remarks. Usana oblongincisa is similar to U. demochares but differs from the latter in: pronotum with ventral lobe with a dark brown spot (without spot in U. demochares); forewing yellowish brown with a black marking at base, costal margin and clavus respectively with a longitudinal pale yellow stripe (forewing pale yellowish brown but without such marking and stripe in U. demochares).
The host plant information for Usana oblongincisa presented in this paper was retrieved from the collectors.
description: Published as part of Long, Jian-Kun, Yang, Lin & Chen, Xiang-Sheng, 2015, Six new species of the planthopper genus Usana Distant, 1906 (Hemiptera: Fulgoromorpha: Achilidae) from China, pp. 489-507 in Zootaxa 3947 (4) on pages 500-503, DOI: 10.11646/zootaxa.3947.4.2, http://zenodo.org/record/239136