Youtuus Chen & Gong, 2018

Chen, Xiang-Sheng & Gong, Nian, 2025, Taxonomic study of the Caliscelidae (Hemiptera: Fulgoromorpha: Fulgoroidea) from China, Zootaxa 5670 (1), pp. 1-129 : 112

Youtuus Chen & Gong, 2018

Youtuus Gong, Yang & Chen, 2018b: 85 .

Type species. Youtuus erythrus Gong, Yang & Chen, 2018 , by original designation.

Supplementary description. Female genitalia. Anal segment short and small, anal pore near apex. Abdominal sternite VII broad and large, nearly spheroidal. Gonapophysis VIII small, with four spines at apical margin. Gonapophysis IX with two symmetrical lobes, each lobe with many spines at dorsal margin. Gonoplac broad and large.

Host plant. Bamboo.

Distribution. Southwestern China (Guizhou Province).

Note. Until now the genus was known two species from China, two species is described in this paper.

Key to species of genus Youtuus

1. Body mainly orange-red to red ( Fig. 95A, B ); male pygofer in posterior view without pair of processes ( Fig. 96H, B )................................................................................................... Y. erythrus

–. Body mainly brown to dark brown ( Fig. 99A, B ); male pygofer in posterior view with pair of processes ( Fig. 100H )................................................................................................... Y. strigatus

Figures

FIGURE 95. Youtuus erythrus 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 96. Youtuus erythrus 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 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).