Discophorellus cehengensis, Zhang, Pei & Chen, Xiang-Sheng, 2011

Zhang, Pei & Chen, Xiang-Sheng, 2011, Two new species of the genus Discophorellus Tsaur & Hsu (Hemiptera: Fulgoromorpha: Cixiidae: Cixiini) from Guizhou Province, China, Zootaxa 3105, pp. 60-68 : 61-63

Discophorellus cehengensis sp. nov.

( Figs 1–11 , 36, 37 )

Description. Body length (from apex of vertex to tip of forewings): male 6.2–7.1 mm (n = 11), female 7.0– 7.8 mm (n = 7); forewing length: male 5.5–6.2 mm (n = 11), female 6.1–7.0mm (n = 7).

Coloration. General color yellowish brown. Body covered with white powdery wax. Median part of eyes black, surrounding part yellowish brown. Median ocellus pale yellow, semihyaline. Median part of vertex blackish brown, lateral parts yellowish-white, carinae yellow to brown. Median area of pronotum yellowish brown, lateral areas dark brown; Mesonotum dark brown. Face brown to dark brown, carinae brown. Rostrum generally yellowish brown with apical part dark brown. Tegmina yellowish brown, semihyaline, each with a blackish brown stripe originating from apical part of clavus; veins yellow to brown; tubercles yellow to brown; stigma yellowish brown. Hind tibiae yellow, lateral and apical spines yellow at base, black apically; platellae of tarsi yellow. Abdomen yellow to yellowish brown ventrally.

Head and Thorax. Eyes ellipsoid-like; median ocellus situated on intersection of frontoclypeal suture and median carina of frons. Vertex with lateral sides tapering as shown in Figs 1 , 36 and 37 , width and length almost equal; anterior margin slightly prominent into obtuse angle, posterior margin arched concave, the bottom truncated; median carina almost reaching subapical carina; lateral carina slightly S-like; subapical carina joining lateral carinae at apical eighth. Frons as shown in Figs 2 , 1.3 times longer than wide; lateral carinae slightly S-like; anterior margin slightly concave into obtuse angle. Clypeus with median carina distinct and elevated throughout; lateral sides of median carina with oblique striations. Rostrum reaching hind trochanter, apical and subapical segments equally long. Pronotum as shown in Figs 1 , 36 and 37 ; posterior margin and apical half of lateral carinae strongly elevated, the areas between those deeply depressed; posterior margin concave, forming obtuse angle; as long as vertex. Mesonotum 1.5 times longer than pronotum and vertex combined, inner sides of lateral carinae with oblique striations, median carina indistinct on posteromedian area, which bears transverse striations. Forewings 3 times longer than wide, with sparse setae on tubercles which situated along two side of veins, CuP vein without tubercles, C with 45 tubercles; RP apically trifid, MA apically trifid, MP apically bifid; PCu+A1 relatively long; Sc+R and M fused at superior angle of basal cell. Hind-tibia with 3 lateral spines, 6 apical spines (1 large, 2 medium, 3 small, divided into 3 groups); chaetotaxy of hind tarsus 9/11, 2nd hind tarsus with 8 platellae.

Male Genitalia. Pygofer symmetrical, slightly extended; in lateral view, dorsal margin tilted dorsad, upper part of inner margin slightly arc-shaped concave; lateral lobes symmetrical, medium part caudally convex, sub-triangular; in ventral view, dorsal margin W-shaped, widening from base to middle, almost equal in width from middle to apex. Medioventral process mastoid in ventral view, 2 times wider than long, reaching to half length of lateral lobes; sub-triangular in lateral view. Anal segment long and wide as shown in Figs 4 and 6 ; 2.1 times longer than wide in dorsal view; symmetrical in caudad view, dorsal margin slightly convex, ventral margin slightly arched concave; incompactly connected with pygofer, freely movable; anal style stout, not protruding anal segment. Genital styles as shown in Figs 4–5 and 8–11 ; in ventral view, symmetrical, widening towards apex, apical part extended, apical margin rounded, internal processes broad, touching each other; in lateral view, “L-shaped”, base covered by lateral lobes of pygofer, compactly connected with connective, unmovable; apical margin with bristles in ventral view. Aedeagus short and stout, with four spines, as shown in Figs 8–11 ; two on left side, one with basal two-thirds stout, apical third arc-shaped curved and directed dorsad, other one slender, straight and apical part curving dorsocephalad; one on right side, slender, basal part straight, apical third strongly curving dorsad; the last one on ventral side, with basal two-thirds stout, apical third arc-shaped curved and directed ventrad. Connective stout, as shown in Figs 8–11 ; aedeagal shaft as wide as width of connective plus ventral arm. Flagellum strongly sclerotized, freely movable, structure simple, generally curving left and finger-like in ventral view.

Type material. Holotype: 3, Ceheng County (900m), Guizhou Province, China, 29 June–1 July 2006, Q.-Z. Song; paratypes: 8 3, 2 ƤƤ, same data as holotype; 1 3, 1 Ƥ, Ceheng County (900m), Guizhou Province, China, 29 June–1 July 2006, P. Zhang; 23, Taipingshan (520–859m), Liping County, Guizhou Province, China, 15–23 July 2006, Z.-G. Zhang; 4ƤƤ, Dahemiaozhai (930m), Getuhe, Ziyun County, Guizhou Province, China, 24–27 June 2006, P. Zhang.

Distribution. Southwest China (Guizhou Province).

Remarks. This new species is similar in appearance to D. major Tsaur & Hsu. Without access to specimens of D. major , we have sent the illustrations and habitus figure of D. cehengensis to Prof. Dr. S.-C. Tsaur for comparison with the holotype of D. major . According to his advice, we regard this species as new, the reasons as follows: (1) hind tibiae of D. cehengensis with 6 apical spines, hind tibiae of D. major with 8–9 spines; (2) aedeagus of the new species with one spine on ventral side, the latter with all spines situated on lateral sides; (3) the new species also differs from the latter in the coloration of crossveins and apical cells of tegmina, shape of the medioventral process and the anal segment.

Etymology. The species is named after the type locality, Ceheng, Guizhou Province in China.

Figures

FIGURES 1 – 11. Discophorellus cehengensis sp. nov. (1) Head and thorax, dorsal view; (2) Frons; (3) Forewing; (4) Male genitalia, lateral view; (5) Pygofer and genital styles, ventral view; (6) Anal segment, dorsal view; (7) Anal segment, caudal view; (8) Aedeagus, left side; (9) Aedeagus, right side; (10) Aedeagus, dorsal view; (11) Aedeagus, ventral view. Scale bars = 0.5 mm (Figs 5 – 11), 1 mm (Figs 1 – 4).

FIGURES 36 – 39. Body of adult of Discophorellus. D. cehengensis sp. nov.: 36. dorsal view, 37. lateral view; D. transspinus sp. nov.: 38. dorsal view, 39. lateral view.