Taxonomic study of the Eucarpiini (Hemiptera: Fulgoromorpha: Cixiidae) from China Author Chen, Xiang-Sheng Institute of Entomology, Guizhou University, Guiyang, Guizhou 550025 P. R. China Author Zhi, Yan 0000-0003-1826-8139 Institute of Entomology, Guizhou University, Guiyang, Guizhou 550025 P. R. China & Laboratory Animal Center, Guizhou Medical University, Guiyang, Guizhou 550025 P. R. China zhiyan 0428 @ 163. com; https: // orcid. org / 0000 - 0003 - 1826 - 8139 Corresponding author. chenxs 3218 @ 163. com; https: // orcid. org / 0000 - 0001 - 9801 - 0343 & Institute of Entomology, Guizhou University, Guiyang, Guizhou 550025 P. R. China zhiyan0428@163.com text Zootaxa 2023 2023-09-22 5347 1 1 100 http://dx.doi.org/10.11646/zootaxa.5347.1.1 journal article 10.11646/zootaxa.5347.1.1 1175-5334 8390836 E9658506-5801-4B92-8140-A8FCE1EC8F40 Dilacreon ( Eluzalmon ) parapentagonus sp. nov. ( Figs 24‒26 ) Description . Body length: male 4.6‒5.0 mm ( n = 4), female 4.9‒5.5 mm ( n = 3). Coloration . General color yellowish brown ( Fig. 24A–E ). Eyes dark brown, ocelli light yellow, semitransparent. Vertex generally yellowish brown with carinae light brown. Face generally brown; rostrum yellowish brown. Pronotum and mesonotum brown. Forewing brown, semi-translucent; stigma yellowish brown. Hind tibiae and abdominal sternites yellowish brown. Head and thorax . Vertex ( Figs 24C , 25A ) broad, 2.2 times wider than long; anterior margin truncated, posterior margin archedly recessed. Frons ( Figs 24D , 25B ) widest slightly below the level of antennae, 1.2 times as long as wide; frontoclypeal suture nearly concave into an arch; middle carina complete; lateral carinae distinct and slightly elevated. Pronotum ( Figs 24C , 25A ) 2.5 times longer than vertex; median carina indistinct, posterior margin nearly at right angle. Mesonotum 1.7 times longer than pronotum and vertex combined. Forewing ( Fig. 25C ) 2.4 times longer than wide, with 10 apical and 6 subapical cells; fork Sc+RP slightly basad of fork CuA 1 +CuA 2 , first crossvein r-m at same level as fork MP, RP two branches, MP with five terminals: MP 11 , MP 12 , MP 2 , MP 3 , and MP 4 , fork MP 1 +MP 2 basad of fork MP 3 +MP 4 . Metatibiotarsal formula: 6/7/8, second segment of hind tarsus with three platellae. Male genitalia . Pygofer ( Fig. 25D, E ) symmetrical, dorsal margin concave and U-shaped, slightly widened towards apex in ventral view; in lateral view, lateral lobes arched extended caudally, medioventral process arched in ventral view. Anal segment ( Fig. 25D, F ) tubular, dorsal and ventral margins almost straight, apical lobes horny in lateral view; 1.7 times longer than wide in dorsal view; anal style strap-shaped, slightly beyond anal segment. Gonostyli ( Fig. 25D, E, G ) symmetrical in ventral view; in inner lateral view, base of ventral margin nearly straight, dorsal margin bending inwards at a nearly right angle in the middle, apical part extended, apical margin round. Aedeagus ( Fig. 25H–K ) with total of five processes. On right side, apex of periandrium with two curved spinous processes, the upper one medium-sized, cephalically directed, the lower one longer, apex left-ventrocephalically directed; apical half of ventral margin swollen triangularly, basal half of periandrium densely covered with fine denticles; left apex with a longest spinous process, sinuous, which basal half slightly curved downwards and apical half straight, ventrocephalically directed. Endosoma (=flagellum) moderately sclerotised, relatively short, generally dorsally curved. Base of left side with a medium-sized spinous process, slightly curved and left-cephalically directed; dorsal margin near apex with a short spinous process, straight, apex ventrocephalically directed. Female genitalia . Posterior margin of pregenital sternite concave.Tergite IX( Fig. 26A, D ) moderately sclerotised, 1.2 times longer than wide in caudal view. Anal tube ( Fig. 26A, C ) short, nearly rectangular, slightly widened towards apex, 1.1 times wider than long in dorsal view; dorsal and ventral margins slightly convex in lateral view, anal styles strap-shaped. Gonapophysis VIII ( Fig. 26E ) elongate, and slightly curved upwards. Gonapophysis IX ( Fig. 26F ) with one middle tooth, at a distance ratio, between middle tooth to apex and length of denticulate portion, of 1.7. Gonoplac ( Fig. 26G ) rod-like, 3.8 times longer than wide. Posterior vagina ( Fig. 26H, I ) elongate. The ventral wall of posterior vagina with a longitudinal long and slender sclerite on left side. The base of dorsal wall with a large near-elliptical sclerite and a smaller sclerite on the left, the right side of the middle area with two longitudinal narrow sclerites. FIGURE 22. Dilacreon ( Eluzalmon ) lobatus Zhang & Chen, 2013 , male. A. Habitus, dorsal view; B. Habitus, lateral view; C. Head and thorax, dorsal view; D. Face, ventral view; E. Head, lateral view. Scale bars: 0.5 mm. FIGURE 23. Dilacreon ( Eluzalmon ) lobatus Zhang & Chen, 2013 , male. A. Head and thorax, dorsal view; B. Face, ventral view; C. Forewing; D. Genitalia, lateral view; E. Pygofer and gonostyli, ventral view; F. Anal segment, dorsal view; G. Anal segment, caudal view; H. Gonostyli, lateral view; I. Connective, dorsocephalic view; J. Aedeagus, right side; K. Aedeagus, left side; L. Aedeagus, dorsal view; M. Aedeagus, ventral view. Scale bars: 0.5 mm (A, B, D–M); 1.0 mm (C). (After Zhang and Chen, 2013a ). FIGURE 24. Dilacreon ( Eluzalmon ) parapentagonus sp. nov. , male. A. Habitus, dorsal view; B. Habitus, lateral view; C. Head and thorax, dorsal view; D. Face, ventral view; E. Head, lateral view. Scale bars: 0.5 mm. FIGURE 25. Dilacreon ( Eluzalmon ) parapentagonus sp. nov. , male. A. Head and thorax, dorsal view; B. Face, ventral view; C. Forewing; D. Genitalia, lateral view; E. Pygofer and gonostyli, ventral view; F. Anal segment, dorsal view; G. Gonostyli, inner lateral view; H. Aedeagus, right side; I. Aedeagus, left side; J. Aedeagus, dorsal view; K. Aedeagus, ventral view. Scale bars: 0.5 mm (A, B, D–K); 1.0 mm (C). FIGURE 26. Dilacreon ( Eluzalmon ) parapentagonus sp. nov. , female.A. Genitalia, lateral view; B. Genitalia, ventral view; C. Anal segment, dorsal view; D. Tergite IX, caudal view; E. Gonapophysis VIII and gonocoxa VIII, ventral view; F. Gonapophysis IX, lateral view; G. Gonoplac, lateral view; H. Posterior vagina, ventral view; I. Posterior vagina, dorsal view. Scale bars: 0.5 mm. Type material. Holotype : ♂, CHINA : Fenshuiling National Nature Reserve ( 22°46’N , 103°13’E ), Jinping County , Yunnan Province , 5 August 2015 , leg. Zhi-Min Chang ; paratypes : 2♂♂ 1♀ , Bakaxiaozhai ( 21°58’N , 101°13’E ), Mengla County , Yunnan Province , 20‒30 July 2012 , leg. Wei-Bin Zheng and Shi-Yan Xu ; 1♂, Bakaxiaozhai , Mengla County , Yunnan Province , 14 June 2016 , leg. Liang-Jing Yang ; 2♀♀ , Bakaxiaozhai , Mengla County , Yunnan Province , 11 March 2017 , leg. Zheng-Xue Zhao. Host plant. Unknown. Distribution. China ( Yunnan ). Remarks. Male genitalia of D. ( E. ) parapentagonus sp. nov. are similar to those of D. ( E. ) pentagonus Fennah, 1980 , but differ in: (1) left apex of periandrium with one spinous process (left apex of periandrium with two spinous processes in D. ( E. ) pentagonus ); (2) left side of endosoma with a medium-sized spinous process basally (left side of endosoma without process basally in D. ( E. ) pentagonus ); (3) vertex with middle carina, anterior margin transverse (vertex without middle carina, anterior margin angulate in D. ( E. ) pentagonus ); (4) forewing without crossvein CuA 1 -CuA 2 (Cu 1a -Cu 1b ) (the latter with crossvein Cu A1 -Cu A2 (Cu 1a -Cu 1b )). Etymology. The specific name refers to the number and location of aedeagal spinous processes of this new species which is similar to D. ( E. ) pentagonus Fennah, 1980 .