Bambusicaliscelis clavatus sp. nov. Fig. 4 Description. Measurements. Body length (from apex of vertex to tip of abdomen): male 4.3 mm; forewing length: male 1.8 mm. Coloration. Body mainly brown; longitudinal stripe from apex of vertex to tip of abdomen pale yellow. Frons brown with small, yellowish-white tubercules between lateral and sublateral carinae. Clypeus dark brown. Eyes yellowish brown. Pronotum and mesonotum lateral areas with several yellowish-brown sensory pits. Forewing brown to dark brown. Abdominal 4th and 5th pleuron pale yellow. Head and thorax. Vertex with anterior margin subtruncated, width of vertex including eyes as long as pronotum. Vertex at middle 0.6 times wider than width at base. Frons 0.9 times wider at middle than widest part; sublateral carinae slightly keeled; median carina distinct; areas between sublateral carinae and lateral carinae slightly depressed. Pronotum as long as vertex. Mesonotum 0.8 times as long as vertex and pronotum together in middle line, 3-carinate; median carina weak. Spinal formula of hind leg 7-3-2. Male genitalia. Anal segment in dorsal view 1.4 times longer at middle than at widest part, narrowing apically, with apical margin roundly convex; in lateral view dorsal margin slightly convex; ventral margin slightly concave in middle, base half as broad, apex half as narrow. Pygofer in lateral view with posterior margin with upper half roundly convex, lower half strongly quadrangular convex, ventral margin strongly oblique; in posterior view 2.1 times longer than at its widest part; in ventral view, posterior margin with a claviform medioventral process. Genital style in lateral view large and broad, ventral margin convex, dorsal margin sinuate, apical margin slightly convex; finger-like process apically arising from dorsal margin, slightly dorsally curved, narrowing apically; in ventral view long, median portion broad. Phallobase tubular; apex ventrally divided into double petals; ventral margin of distal third resembles a finger process. Aedeagus double-tubular, much more slender and longer, encircled in phallobase, reflexed dorsad at level of apical third of phallobase, proximal ventrally curved toward apex, tapering apically. Host plant. Bamboo. Distribution. China (Jiangxi Province) (Fig. 5). Type materials. Holotype: ♂, China: Jiangxi Province, Qianshan County, Wuyi Mountains, 2018-VIII-19, Xiangsheng Chen. Paratype, 1♂: data same as holotype, 2013-VIII-3, Jiankun Long. Etymology. The specific name is derived from the Latin words " clava " (a staff or club), referring to the shape of the claviform medioventral process. Remarks. This new species is closely related to B. fanjingensis Chen & Zhang, 2011, but differs by the following: 1) spinal formula of hind leg 7-3-2 (spinal formula of hind leg 6-3-2 in B. fanjingensis); 2) posterior margin of pygofer with a strongly claviform medioventral process (with a slightly medioventral process in B. fanjingensis); 3) aedeagus reflexed dorsad (reflexed ventrad in B. fanjingensis).

Published as part of Gong, Nian, Chen, Xiang-Sheng & Yang, Lin, 2023, Two new bamboo-feeding species of the planthopper genus Bambusicaliscelis Chen & Zhang, 2011 (Hemiptera, Fulgoromorpha, Caliscelidae) from China, pp. 111-120 in ZooKeys 1183 on page 111, DOI: 10.3897/zookeys.1183.110917