Youtuus strigatus Gong, Yang & Chen, 2018

Chen, Xiang-Sheng & Gong, Nian, 2025, Taxonomic study of the Caliscelidae (Hemiptera: Fulgoromorpha: Fulgoroidea) from China, Zootaxa 5670 (1), pp. 1-129 : 115-117

Youtuus strigatus Gong, Yang & Chen, 2018

( Figures 99–101 )

Youtuus strigatus Gong, Yang & Chen, 2018b: 91 .

Supplementary description. Measurements. Body length including forewing: female 6.9–7.1 mm (N = 3); forewing length: female 5.6–5.7 mm (N = 3).

Female genitalia. Anal segment short and small. Abdominal sternite VII in ventral view symmetrical, posterior margin roundly concave, lateral margin slightly convex. Gonapophysis VIII elongate, with four spines at apical margin. Gonapophysis IX with two symmetrical lobes, each lobe with many spines at dorsal margin. Gonoplac with outer surface shagreen; in lateral view with base half broad, apical half narrowed.

Host plant. Bamboo.

Distribution. Southwestern China (Guizhou Province).

Type material. 4♂♂ 6♀♀, China: Guizhou Province, Suiyang County, Kuankuoshui National Natural Reserve (28°14’N, 107°00’E), on bamboo, 2017-VII-13, Ya-Lin Yao, Nian Gong, Yong-Jin Sui and Yan Zhi ; 2♂♂ 5♀♀, China: Guizhou, Duyun City, Doupengshan (26°15’N, 107°31’E), on bamboo, 2017-VI-9, Liang-Jing Yang and Ya-Lin Yao .

Remarks. Y. strigatus Gong, Yang & Chen, 2018 differs from other species of genus Youtuus by the following characteristics: 1) forewing with a large dark brown transverse stripe and a narrow dark brown longitudinal stripe; 2) pygofer in posterior view with a pair of large tooth-like processes located above the middle of lateral margin, point to each other; 3) genital styles in lateral view, dorsal margin with apical third dorsally uplifted and branched into two stubbed processes apically.

Figures

FIGURE 99. Youtuus strigatus Gong, Yang & Chen, 2018 A. Male habitus, dorsal view; B. Male habitus, lateral view; C. Female habitus, dorsal view; D. Female habitus, lateral view. Scale bars:0.5 mm (A–D).

FIGURE 100. Youtuus strigatus Gong, Yang & Chen, 2018 Male: A. Head and thorax, dorsal view; B. Face; C. Head and thorax, lateral view; D. Forewing; E. Hindwing; F.Anal segment, dorsal view; G. Male genitalia, lateral view; H. Pygofer, posterior view; I. Genital styles, posterior view; J. Pygofer and genital styles, ventral view; K. Aedeagus, lateral view; L. Aedeagus, dorsal view. Scale bars: 2 mm (D, E); 1 mm (G); 0.5 mm (A–C, F, H–L).

FIGURE 101. Youtuus strigatus Gong, Yang & Chen, 2018 Female: A. Genitalia, lateral view; B. Genitalia, ventral view; C. Anal segment, dorsal view; D. Abdominal sternite VII, ventral view; E. Gonapophysis VIII, lateral view; F. Gonapophysis IX, lateral view. Scale bars: 0.5 mm (A, B, D); 0.2 mm (C, E, F).