taxonID	type	description	language	source
326BC776FFFBFFB2FF4DC59CFA45D012.taxon	type_taxon	Type species: Idiocerus laurifoliae Vilbaste 1965.	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
326BC776FFFBFFB2FF4DC59CFA45D012.taxon	description	Description. Coloration. Body uniformly yellowish brown, with dark brown spots on pronotum, mesonotum, and fore legs (coxa and femur). Morphology. Head wider than pronotum; crown slightly narrower medially than near eyes. Face wider across eyes than long; lateral margins of genae slightly concave. Ocelli situated above ends of lateral frontal sutures, closer to adjacent eyes than to each other. Antennal flagellum in male without distal dilation. Anteclypeus slightly projecting beyond genae, apically expanded; lora narrow and elongate. Pronotum finely shagreen. Scutellum broader than long and longer than combined length of crown and pronotum. Forewings with four apical cells and three subapical cells; outer subapical cell smallest; central and outer subapical cells closed; inner subapical cell longest and open basally; appendix moderately broad. Hind femoral macrosetal formula 2 + 0; hind tibial macrosetae PD 24 – 26, AD 6 – 8, AV 7 – 9. Hind basitarsus with three platellae on distal transverse row. Male genitalia. Pygofer with a dorsolateral fracture; anterior basal fracture absent; dorsal anterior apodeme poorly developed along anterior margin; ventral margin of pygofer slightly concave along posterior half. Anal collar (modified segment X) well developed and fused to dorsal bridge of pygofer. Subgenital plates elongate, distinctly longer than pygofer, bearing sparse long hair-like setae. Style elongate; apophysis tubular, of nearly uniform width to apex, slightly curved dorsad; apex bearing a subapical row of stout, short setae and a large tooth-like process near ventral margin. Connective T-shaped. Aedeagus with shaft elongate, gonopore subapical on ventral surface; preatrium small; dorsal apodeme well developed and apically laterally expanded. Female genitalia. Sternite VII convexly produced; posterior margin of median area narrowly concave in ventral view. Ovipositor strongly projecting beyond pygofer; second valvula slightly elongate, nearly uniform in width except narrowing to an acute apex; dorsal margin serrated, with approximately 5 – 6 teeth near subapex.	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
326BC776FFFBFFB2FF4DC59CFA45D012.taxon	biology_ecology	Host plant. Salicaceae (Populus spp.).	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
326BC776FFFBFFB2FF4DC59CFA45D012.taxon	distribution	Distribution. Central Asia, East Asia and the Russian Far East.	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
326BC776FFFBFFB2FF4DC59CFA45D012.taxon	discussion	Remarks. Parocerus closely resembles Populicerus in overall appearance but differs in having males without an apical antennal disc (present in Populicerus), three platellae on the first hind tarsomere (two in Populicerus), male subgenital plates nearly straight and distinctly longer than pygofer lobes (variously dorsally curved and only slightly longer than pygofer in Populicerus). It further differs in structure of the style, the apical portion of which bears a compact cluster of short setae, whereas in Populicerus a lateral apical process bears several stout long setae.	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
326BC776FFFBFFB1FF4DC216FB56D30A.taxon	description	(Figs 1 a – b, e, 2) Male. Body greyish brown (Fig. 1 a). Face (Fig. 1 e) yellowish brown, except median upper area pale grey; frontoclypeus and anteclypeus yellowish brown; lora and gena pale yellowish brown. Scutellum pale yellowish brown with basal angle spots brown. Forewing (Fig. 1 b) pale grey, with large dark brown markings along costal margin and at apex. Male abdominal apodemes. Apodemes of sternite I with short processes (Fig. 2 a). Apodemes of sternite II elongate triangular, medially separated by a U-shaped notch with inner margins almost parallel (Fig. 2 b). Apodemes tergite III subquadrate, medially separated by a narrow U-shaped notch, apically truncate, extending to posterior margin of tergite IV (Fig. 2 c). Male genitalia. Pygofer (Fig. 2 d) with sparse short setae along ventral margin of middle to posterior portion; anal tube process short, apically expanded and finger-like. Subgenital plate (Fig. 2 d) gradually broadened from midlength toward apex. Style (Fig. 2 f) with apophysis about half length of style, apically narrowly rounded; a sharp tooth-like process present near, but not reaching apical margin (Fig. 2 g). Connective with stem (Fig. 2 k) dorsally expanded at apex, forming a sharp, spine-like process. Aedeagal shaft apex (Fig. 2 i, j) arrow-shaped, with pair laterally directed processes near subapex; dorsal apodeme apically slightly expanded in lateral view, fan-like in ventral view; gonopore positioned distal to apical processes. Measurements. Body length: male 6.2 – 6.4 mm.	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
326BC776FFFBFFB1FF4DC216FB56D30A.taxon	materials_examined	Material examined. Holotype: ♂, CHINA: Qinghai Province, Qilian County, Lamashi Township, 3. viii. 2021, collected by Zhang Bin, sweeping Populus sp. Salicaceae; paratypes: 3 ♂♂, same date as holotype.	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
326BC776FFFBFFB1FF4DC216FB56D30A.taxon	distribution	Distribution. China (Qinghai)	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
326BC776FFFBFFB1FF4DC216FB56D30A.taxon	etymology	Etymology. The species is named in honor of Prof. Zizhong Li, a renowned hemipterist, in recognition of his outstanding contributions to the taxonomy of leafhoppers.	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
326BC776FFFBFFB1FF4DC216FB56D30A.taxon	discussion	Remarks. This species can be readily distinguished from P. laurifoliae by the following characters: Forewing with large dark brown markings along costal margin and at apex (such markings absent in P. laurifoliae); subgenital plate gradually broadened from basal half to apex (from basal one-third in P. laurifoliae); style apophysis with apex narrowly rounded, bearing a sharp subapical tooth-like process not reaching apical margin (P. lii, apex finger-like, with a large tooth-like process at apex) and aedeagal shaft apex arrow-shaped, with a pair of laterally directed processes (in P. lii, shaft apex spatulate, with a pair of long posteriorly directed processes).	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
326BC776FFF9FFB6FF4DC08FFB11D04A.taxon	description	(Figs 1 c – d, f – h, 3)	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
326BC776FFF9FFB6FF4DC08FFB11D04A.taxon	description	Male. Body greyish brown. Vertex (Fig. 1 h) pale brown with a pair of irregular grey-brown maculae medially. Face (Fig. 1 f – h) greyish to yellowish brown. Pronotum with irregular dark brown to black markings along anterior margin. Basal angles of scutellum marked with brown to dark brown. Forewings greyish brown with dark brown veins. Thorax and legs yellow, with coxae and femora commonly marked with black spots. Male abdominal apodemes. Apodemes of sternite I similar to that of P. lii, but processes slightly elongate (Fig. 3 a). Apodemes of sternite II with a narrow U-shaped notch, approximately one-third the width of each apodeme (Fig. 3 b). Apodemes of tergite III (Fig. 3 c) broad-elliptical, slightly narrowed at base, gradually widening toward midlength; apical margin with a slight triangular median concavity, extending beyond posterior margin of tergite IV. Male genitalia. Pygofer and anal tube process (Figs 3 d – e) similar to that of P. lii. Subgenital plate (Fig. 3 d) parallel sided in distal half and gradually expanding from basal one-third toward apex, maintaining a nearly uniform width; ventral margin nearly straight. Style (Figs 3 f – g) with apophysis approximately half length of style, apically finger-like; apex bearing a large, tooth-like process. Connective stem (Figs 3 k – l) with a blunt, spine-like process. Aedeagal shaft apex spatulate, with pair of long, posteriorly directed processes; dorsal apodeme strongly expanded apically in lateral view; gonopore situated near base of apical processes. Female. Coloration similar to that of the male but generally paler. Female genitalia. Sternite VII with posterior margin produced, slightly concave medially. Valvulae of ovipositor narrow and conspicuously projecting beyond ovipositor sheath; second valvula slightly curved dorsad medially, with 17 – 20 teeth along dorsal apical margin. Measurements. Body length: male 6.5 – 7.6 mm, female 6.8 – 8.1 mm.	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
326BC776FFF9FFB6FF4DC08FFB11D04A.taxon	materials_examined	Material examined: Holotype: ♂, CHINA: Gansu Province, Yuzhong county, Mt. Xinglongshan, 12. vii. 1986, collected by Z. T. Sun; 2 ♂♂, 4 ♀♀, Gansu Province, Lanzhou city, Liujiapu, at light, 16. vii. 1987, Y. L. Zhang; 1 ♂, Inner Mongolia Autonomous Region, Baotou city, Mt. Jiufengshan, 27. vii. 1987; 2 ♀♀, Gansu Province, Tianzhu county, 13. iv. 1989, J. C. Wang; 8 ♂♂, 10 ♀♀, Inner Mongolia Autonomous Region, Dalat Banner, Shulinzhao town, 20. viii. 2004, B. Zhang, sweeping Populus sp. Salicaceae; 5 ♂♂, 11 ♀♀, Inner Mongolia Autonomous Region, Otog Front Banner, Dundatu town, 25. vii. 2006, B. Zhang, sweeping Populus sp. Salicaceae; 3 ♂♂, 6 ♀♀, Gansu Province, Suburban Area of Subei county Seat, 19. viii. 2007, B. Zhang, sweeping Populus sp. Salicaceae; 1 ♂, 5 ♀♀, Gansu Province, Jiuquan city, 24. viii. 2007, B. Zhang; 2 ♂♂, 5 ♀♀, Qinghai Province, Huangyuan county, 30. viii. 2007, B. Zhang, sweeping Populus sp. Salicaceae; 10 ♂♂, 13 ♀♀, Inner Mongolia Autonomous Region, Mt. Daqingshan, 27. vii. 2008, B. Zhang, sweeping Populus sp. Salicaceae; 2 ♂♂, 4 ♀♀, Qinghai Province, Xunhua county, 12 - 13. viii. 2009, Z. H. Yang; 2 ♂♂, 5 ♀♀, Hebei Province, Mt. Wutaishan, 15. viii. 2012, B. Zhang, sweeping Populus sp. Salicaceae; 3 ♀♀, Xizang Autonomous Region, Lhasa city, 3650 m, 20. viii. 2013, J. F. Wang; 5 ♂♂, 7 ♀♀, Inner Mongolia Autonomous Region, Arxan City, 16. viii. 2014, B. Zhang, sweeping Populus sp. Salicaceae; 3 ♂♂, 5 ♀♀, Xizang Autonomous Region, Suburban Area of Nyingchi City, 15. vii. 2016, B. Zhang, sweeping Populus sp. Salicaceae; 13 ♂♂, 16 ♀♀, Mongolia, Töv Province, 1. viii. 2019, B. Zhang, sweeping Populus sp. Salicaceae; 10 ♂♂, 12 ♀♀, Mongolia, Zavkhan Province, Aldarkhaan county, Aldar village, 1. viii. 2019, B. Zhang, sweeping Populus sp. Salicaceae; 11 ♂♂, 14 ♀♀, Inner Mongolia Autonomous Region, Hohhot city, Horinger county, Shengliying village, 18. vii. 2020, W. Wang, sweeping Populus sp. Salicaceae; 7 ♂♂, 6 ♀♀, Inner Mongolia Autonomous Region, Chifeng city, Ningcheng county, Dahushi tourist area, 21. vii. 2020, B. Zhang, sweeping Populus sp. Salicaceae; 11 ♂♂, 16 ♀♀, Inner Mongolia Autonomous Region, Tongliao city, Horqin Left Wing Middle banner, 25. vii. 2020, B. Zhang, sweeping Populus sp. Salicaceae; 5 ♂♂, 7 ♀♀, Inner Mongolia Autonomous Region, Ulanqab city, Qahar right rear banner, 19. vii. 2020, B. Zhang, sweeping Populus sp. Salicaceae; 8 ♂♂, 12 ♀♀, Inner Mongolia Autonomous Region, Xilingol League, Zhenglan banner, 20. vii. 2020, B. Zhang, sweeping Populus sp. Salicaceae; 6 ♂♂, 10 ♀♀, Inner Mongolia Autonomous Region, Alxa league, Alxa left banner, 31. vii. 2020, B. Zhang, sweeping Populus sp. Salicaceae; 13 ♂♂, 17 ♀♀, Qinghai Province, Menyuan county, Dongchuan town, Ketukou Village, 26. vii. 2021, B. Zhang, sweeping Populus sp. Salicaceae; 5 ♂♂, 9 ♀♀, Qinghai Province, Menyuan county, Deer village, 25. vii. 2022, W. X. Yang; 6 ♂♂, 7 ♀♀, Shanxi Province, Datong city, Yanggao county, Heta village, 24. viii. 2022, J. F. He, sweeping Populus sp. Salicaceae; 8 ♂♂, 11 ♀♀, Shanxi Province, Lüliang city, Pangquangou, 1795 m, 23. vii. 2023, Z. H. Zhang, sweeping Populus sp. Salicaceae; Liaoning Province, Chaoyang city, Jianping county, Kalaqin town, 14. viii. 2023, W. X. Yang, sweeping Populus sp. Salicaceae.	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
326BC776FFF9FFB6FF4DC08FFB11D04A.taxon	distribution	Distribution. China (Gansu, Hebei, Inner Mongolia, Liaoning, Shanxi, Shaanxi, Qinghai, Xizang); Korea; Russia; Mongolia (Töv, Zavkhan); Kazakhstan.	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
326BC776FFF9FFB6FF4DC08FFB11D04A.taxon	biology_ecology	Biology. This species is widely distributed in northeastern, northern, and northwestern China. It is an important pest of poplar (Populus), on which both adults and nymphs feed, often causing notable damage.	en	Li, Xiang, Xiao, Yifan, Zhang, Bin (2026): A second species of the leafhopper genus Parocerus Vilbaste (Hemiptera: Cicadellidae) from Qinghai, China. Zootaxa 5856 (1): 35-42, DOI: 10.11646/zootaxa.5856.1.7, URL: https://doi.org/10.11646/zootaxa.5856.1.7
