Cylindratus longicephalus Meng, Qin & Wang, 2020

Chen, Xiang-Sheng & Gong, Nian, 2025, Taxonomic study of the Caliscelidae (Hemiptera: Fulgoromorpha: Fulgoroidea) from China, Zootaxa 5670 (1), pp. 1-129 : 9-10

Cylindratus longicephalus Meng, Qin & Wang, 2020

( Figures 1–3 , 4A, B )

Cylindratus longicephalus Zhang et al., 2020: 123 .

Description. Measurements. Body length (from apex of vertex to tip of abdomen): male 5–5.2 mm (N = 2), female 5.9–6.1 mm (N = 2); forewing length: male 1.8–1.9 mm (N = 2), female 2–2.1 mm (N = 2).

Coloration. Male: General coloration yellowish brown to blackish brown. Head, thorax, and abdomen with broad pale central longitudinal stripe dorsally. Frons brown, median carina slightly red, the small tubercules yellowish brown. Clypeus brown. Eyes grey brown. Legs yellowish brown. Forewing brown. Abdominal tergites blackish brown, except central longitudinal stripe yellowish white, ventral areas yellowish brown. Female: General color light yellowish brown with somewhat green. Eyes grey brown. Forewing brown with somewhat red.

Head and thorax. Vertex with anterior margin strongly convex, longer in middle line than broad at base (1.2:1), and longer in middle line than pronotum (2.3:1). Frons 1.6 times longer in middle line than widest part. Clypeus with median carina distinct. Mesonotum 0.5 times as long as vertex and pronotum together in middle line.

Male genitalia. Anal segment in dorsal view with length 0.9 times longer in middle line than widest part, narrowing apically, basal margin straight, apical margin rounded; in lateral view, broadest near the middle and tapering toward apex, ventral margin straight. Pygofer in lateral view with dorsal margin distinctly shorter than ventral margin, posterior margin concave in the middle; in posterior view with length 1.7 times as long as widest part; in ventral view with posterior margin straight, anterior margin roundly convex. Genital style in lateral view broad, large, a strong spine-like process arising from dorsal margin apically, directed dorsad, slightly curved, tapering apically; in ventral view long and narrow, with apex hooklike. Aedeagus short, tubular, in lateral view with ventral margin roundly convex in the middle, apical margin triangularly convex; in dorsal view with proximal part bulge outward distinctly.

Female genitalia. Anal segment in dorsal view with length 0.9 times longer in middle line than widest part, narrowing apically, apical margin slightly rounded; in lateral view, small, narrowing apically. Abdominal sternite VII in ventral view with posterior margin sinuate, with width 4.2 times as long as middle line. Gonapophysis VIII (first valvula) elongate, with six spines at apical margin. Gonapophysis IX (second valvula) with two symmetrical lobes, each lobe with many spines at dorsal margin, dorsal margin with an indent. Gonoplac (third valvula) broad, quadrilateral.

Host plant. Bamboo ( Chimonobambusa angustifolia C. D. Chu & C. S. Chao ) ( Chen & Yang, 2023) ( Figure 4C ).

Distribution. Southwestern China (Guizhou Province).

Material examined. 2♂♂ 1♀, China: Guizhou Province, Leishan County, Leigong Mountain , 2011-VII-17, Xiang-Sheng Chen ; 8♂♂ 11♀♀, China: Guizhou Province, Leishan County, Leigong Mountain , 2019-VIII-23, Qiang Luo, Liang-Jing Yang and Ya-Lin Yao .

Note. The above description is derived from Zhang et al., 2020, for the first time in English.

Figures

FIGURE 1. Cylindratus longicephalus Meng, Qin & Wang, 2020 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 2. Cylindratus longicephalus Meng, Qin & Wang, 2020 Male. A. Head and thorax, dorsal view; B. Face; C. Head and thorax, lateral view; D. Forewing; E. Anal segment, dorsal view; F. Male genitalia, lateral view; G. Pygofer, posterior view; H. Genital styles, lateral view; I. Pygofer and genital styles, ventral view; J. Aedeagus, lateral view; K. Aedeagus, dorsal view. Scale bars: 0.5 mm (A–K).

FIGURE 3. Cylindratus longicephalus Meng, Qin & Wang, 2020 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); 0.3 mm (C, E, F).

FIGURE 4. Habitat of Cylindratus longicephalus Meng, Qin & Wang, 2020 A. Living male adult; B. Living female adult; C. General environment and host plant. 7 Sept. 2014, Leigongshan National Natural Reserve, Leishan County, Guizhou Province, photograph by Xiang-Sheng Chen.