Proutista quadratus Chen & Zhang, 2025

Proutista quadratus Chen & Zhang View in CoL sp. nov.

( Figures 8–9 View FIGURE 8 View FIGURE 9 )

Measurement. Body length: male (N=2) (incl. tegmen): 7.8–8.2 mm (except tegmen: 2.8–3.1 mm), female (N=4) (incl. tegmen): 8.3–8.8 mm (except tegmen: 2.5–2.7 mm); length of tegmen: male (N=2): 7.0– 7.3 mm, female (N=4): 8.0– 8.5 mm.

Coloration. Body brown to dark brown ( Fig. 8A View FIGURE 8 ). Vertex with lateral marginal carinae yellow, disc yellowish in median and dark brown adjacent to lateral marginal carinae ( Fig. 8B View FIGURE 8 ). Frons yellowish, with lateral marginal carinae yellowish, in lateral view, genae white, each tinged black at part adjacent to clypeus, with a small black spot in front of ventral margin of eyes ( Figs 8C, D View FIGURE 8 ). Clypeus brown in disc and darker in lateral parts, with a longitudinal median carina yellowish, and two lateral ones dark brown ( Fig. 8C View FIGURE 8 ). Rostrum dark brown ( Figs 8C, D View FIGURE 8 ). Eyes gray; ocelli white. Antennae yellowish ( Figs 8B–D View FIGURE 8 ). Pronotum dark brown, yellow at middle, with some irregular yellow spots on each lateral part, margins yellow ( Figs 8C–D View FIGURE 8 ). Mesonotum brown, with longitudinal median and lateral carinae yellow, scutellum with posterior margin yellow ( Figs 8A, B View FIGURE 8 ). Tegula dark brown ( Figs 8B–D View FIGURE 8 ). Tegmina generally brown and semitransparent, with almost every apical cell with a transparent spot or spots, with two oval transparent regions at basal part and a large square-shaped transparent region on the central portion adjacent to posterior margin, dark markings along CuA 1+2 separating basal and central transparent regions; veins yellow on basal half and orange to red on apical half ( Figs 8A, E View FIGURE 8 ). Wings brownish and semitransparent, with three transparent spots adjacent to posterior margin, smallest spot of which at distal side of CuA 1, largest one between CuA 1 and CuA 2, other one at basal side of CuA 2, veins dark brown ( Fig. 8F View FIGURE 8 ). Legs white to yellowish, with a black stripe on each coxa of fore and middle legs ( Figs 8C, D View FIGURE 8 ). Abdomen dark brown to black, with median carina yellow, and several rows of small yellow spots on tergites. Anal tube of male and gonostyli red, lighter at base ( Figs 8B, D, G View FIGURE 8 ); phallic complex orange. Female genitalia brown and dark brown, with red markings below anal tube ( Figs 13C–F View FIGURE 13 ).

Structure. Head and thorax. Frons with lateral marginal carinae contiguous almost throughout, except for extreme apex slightly separated ( Fig. 8C View FIGURE 8 ). Rostrum with apical segment expanded to apex, beyond coxae of hind legs ( Figs 8C, D View FIGURE 8 ). Antennae with pedicelli about 1.6 times longer than widest part and shorter than frons, subcylindrical, slightly expanded distad, and slightly concave at apex ( Figs 8B–D View FIGURE 8 ). Mesonotum about eight times longer than pronotum in midline, disc raised apparently, and posterior part flat, with three distinct longitudinal carinae, median carina straight and two lateral ones curved towards median carina at their middle ( Figs 8B, D View FIGURE 8 ). Tegmina narrow and elongate, about three times longer than widest part, narrowest basally and widest centrally, then slightly constricted distad, posterior margin arched, jugal margin protruded, apical margin truncated; RA 2 single or two- or threebranched (typically two-branched), branches curved anterad; MP 3+4 forked about same level as MP 1 forking, and MP 3 smooth throughout, C3b short and triangular, MP 1 aaa forked (occasionally single); CuA forked before first m-cu, CuA 1 and CuA 2 fused near apex to form a common stem and then extending to posterior margin, C5 present and elongate ( Figs 8A, E View FIGURE 8 ). Metatibiotarsal formulae: 4- (4–5)- (5–6) ( Fig. 8C View FIGURE 8 ).

Male genitalia. Anal tube narrow and long, and slightly grooved, with apex at same level as apex of gonostylus, in dorsal view, subtrapezoidal, slightly constricted apically, with anal stylus at middle, epiproct wide and subtrapezoidal, paraprocts long and oval ( Fig. 8G View FIGURE 8 ); in lateral view, widest and convex dorsad in basal third, slightly bifurcate at apex, ventral lobe much longer than dorsal one, pointed and curved ventrad, with dorsolateral margin slightly elevated from basal third to subapical part, ventral margin slightly arched ventrad at basal third and shallowly concave near apex ( Figs 9A, B View FIGURE 9 ). Pygofer narrow, in lateral view, widest ventrally, anterior margin concave at dorsal sixth, posterior margin bluntly concave in ventral quarter, laterodorsal angles roundly protruded ( Figs 9A, B View FIGURE 9 ); in ventral view, venter wide rectangular, with anterior and posterior margins relatively straight, without medioventral process ( Fig. 9C View FIGURE 9 ). Gonostyli narrow and long, asymmetric, left gonostylus with apex expanded and truncated obliquely, forming an acute angle, while right one round and not expanded, in dorsal view, widest in median, constricted and slightly incurved at apex ( Fig. 9E View FIGURE 9 ); in lateral view, wide at base and narrow in other part, upcurved apically; with a significant internal auricular process inside near dorsal base, densely covered long setae on surface, in addition, with a small hook-like process protruded ventrocephalad at subapical part of it, and a conical process protruded caudad on inner caudal side of it ( Figs 9A, D View FIGURE 9 ). Phallic complex moderately short and slender, in dorsal view, periandrium elongate, narrow at base, expanded in median, and constricted distad into a subtriangular process (P 1), round and slightly toward right at apex ( Fig. 9F View FIGURE 9 ); in lateral view, periandrium with basal half relatively wide and apical half constricted, P 1 sword-like and protruded caudad, and ventral basal angle not protruded ( Figs 9G, H View FIGURE 9 ); with other three processes (except for P 1) at apex, from venter to dorsum: a small and acicular process (P 2) on left and dorsal side of P 1, almost parallel to P 1 in lateral view and directed caudad; an acicular process (P 3) on right side, gradually tapered distad, directed dorsocaudad and curved rightwards; a large and elongate process (P 4) at middle, narrow at base, expanded to middle, and gradually tapered distad, directed dorsocephalad and curved rightwards near apex; endosoma relatively large in profile, slightly elevated at base, with lobe-like shape along P 4 at apex ( Figs 9F–H View FIGURE 9 ).

Female genitalia. Pygofer with laterodorsal tergal processes and ventrosternal processes strongly protruded and finger-like; sternal plate with impaired medioventral plate, somewhat protruded dorsad and W-shaped, slightly protruded at middle and rhombic in lateral parts. Gonocoxa IX developed, dorsolateral angle convex. Gonoplac laminated, in caudal view, round and broadest at base, then constricted distad, and truncated at apex. ( Figs 13C–F View FIGURE 13 , 14 View FIGURE 14 ).

Type material. Holotype: ♂ ( NWAFU), Tongmu Village , Wuyi Mountain, Fujian Province, China, 800 m, 16 Aug 2008, coll. Wang Manqiang. Paratypes: 2♂ 4♀ ( NWAFU), same data as holotype ; 1♂ 1♀ ( NWAFU), Qingcheng Mountain , Sichuan Province, China, 12Aug 1957, coll. Zheng Leyi ; 2♂ 1♀ ( NWAFU), Hongtan , Longsheng County, Guangxi Province, China, 6 Aug 2008, coll. Guo Hongwei ; 1♀ ( NWAFU), Taiping Mountain , Liping County, Guizhou Province, China, 2 Aug 2008, coll. Zhanghuang ; 18♂ 11♀ ( NWAFU), Guan Mountain , Yifeng County, Jiangxi Province, E 114.5830°, N 28.5563°, 429 m, 18 July 2024, coll. Chen Weiqiang. GoogleMaps

Plant . Globba racemosa Sm.

Etymology. The specific epithet refers to the square transparent region located on the distal side of claval apex of tegmina.

Remarks. This species closely resembles Proutista monychus Fennah, 1978 in markings of tegmina and coloration of body, but can be separated from it by the following features: tegmina with a transparent spot at apex between RP 2 a and MP 1 aaa, gonostyli asymmetric (right gonostylus round and not expanded at apex); whereas in P. monychus , tegmina without transparent spot between RP 2 a and MP 1 aaa, gonostyli symmetric (right gonostylus acute at apex, same as left).