Paradoxivena, Wei, Cong, Zhang, Yalin & Webb, M. D., 2006

Wei, Cong, Zhang, Yalin & Webb, M. D., 2006, Paradoxivena, a new leafhopper genus (Hemiptera: Cicadellidae: Stegelytrinae) from Tibet, China, Zootaxa 1372, pp. 27-33 : 28-30

Paradoxivena gen. n.

Type species. Paradoxivena zhamuensis sp. n.

Etymology. The generic name is after the bicoloured veins of the forewing. Gender is feminine.

Diagnosis. This new genus forms a group with other Oriental stegelytrine genera (see Intruduction) but can be distinguished from them by: 1) the forewing with veins bicoloured, brown intervened by yellowish white regularly; 2) male pygofer elongate and tapering apically with apex pointed, and pygofer phragma with a strongly developed lateral shelf-like sclerotised area (dorsal connective) from pygofer side to apex of dorsal apodeme of aedeagus; 3) valve broad, almost as long as wide, semicircle-shaped; 4) style with apical process strong, tapered to moderately acute apex, with a few ventral setae subapically; 5) aedeagal shaft with pair of short acute processes subapically on ventral surface and a triangular-like process on each side slightly distad of midlength.

Description. Veins brown intervened by yellow-white ( Fig. 2 ). Head small, distinctly narrower than pronotum, equal in width to scutellum ( Fig. 1 ); fore margin slightly angularly rounded; eyes overlapping pronotum laterally; vertex nearly as long as width between eyes, sloping to front; coronal suture short ( Fig. 1 ); face similar in length to width ( Fig. 5 ); ocelli on anterior margin of vertex, situated approximately 1.5x their own diameter from corresponding eye; lateral frontal suture extending onto vertex, incurved apically, touching lateral margin of corresponding ocellus; transclypeal suture somewhat indistinct; clypellus very narrow basally, broadening apically with apical margin very slightly concave; gena nearly flat; lora broad; rostrum narrow, extending to apex of trochanter, labrum about half length of labium; antennae long, extending to near apex of forewing, arising adjacent to lower corner of eye; antennal ledge present; antennal pit shallow. Pronotum approximately 3x broader than median length; posterior margin slightly concave; lateral margin long; lateral carina present, curved dorsally toward adjacent eye ( Figs 1, 3, 5 ). Proepisternum apparent ( Fig. 3 ). Scutellum approximately equal in length to pronotum, with transversal depression distinct; basal width longer than medial length; posterior half weakly elevated and inclined from transverse suture; posterolateral carina absent; postnotum short, median carina absent ( Figs 1, 3 ). Forewing transparent, with 5 apical cells; 5th apical cell normal; foremargin convex throughout length; middle and outer subapical cells closed, inner subapical cell open; outer subapical cell slightly shorter than medial subapical cell; crossvein present basally between inner claval vein and claval suture, situated at one third distance from base to apex of clavus; appendix moderately broad, slightly truncate apically, extended to fourth apical cell; claval margin strongly elevated and crimped at apex ( Fig. 2 ). Legs densely setose. Fore femur with AM setae arranged irregularly, with numerous macrosetae basad of AM1; IC setae long, comblike; dorsal surface with two groups of very short setae over basal three fifths (AD and PD rows) and more irregularly arranged setae distally (AD row) ( Figs 4, 6 ). Fore tibia rounded dorsally; AD setal row with apical seta thick and others small, short, and irregularly arranged; PD setae thick and in distinctly different length near apex; AV and PV setal rows extending from base to apex ( Figs 7–10 ). Hind femur broadened distally and slightly bowed; several irregularly arranged distal setae elevated on strong bases; numerous relatively shorter setae subapically ( Fig. 14 ). Hind tibia moderately flattened and bowed; PD setae long; AD setae very stout and with some short setae between stout ones; several supranumeral setae present between AD and PD rows ( Figs 11, 12 ).

Male pygofer side longer than broad, with short dorsal and apical macrosetae; dorsal margin nearly horizontal adjacent to segment X; vertical hyaline band absent; phragma with a strongly developed shelf-like sclerotised area from pygofer side to apex of dorsal apodeme of aedeagus ( Figs 16, 17 ), and a nearly Y-shaped medial sclerotised area (in dorsal/ventral view) between segment X and basal apodeme of aedeagus ( Fig. 19 ). Valve broad and almost as long as wide, semicircular, similar to length of subgenital plate in ventral view ( Fig. 21 ). Subgenital plates long, extended to near posterior margin of pygofer; inner margins slightly diverging, apex rounded, outer margin slightly convex, with a dorsal elongate lobe laterobasally holding style preapical lobe; a few irregularly arranged short to moderately long slender setae laterally and apically ( Figs 17, 21 ). Connective somewhat T-shaped; stem moderately long; arms short; stem not extended beyond apex of medial sclerotised area ( Figs 18–20 ). Style with anterior medial lobe very short, anterior lateral apodeme straight and elongate; lateral preapical lobe slight, gradually merging into apical process, the latter strong, elongate, tapered to moderately acute apex, a few fine ventral setae subapically ( Figs 18, 20 ). Aedeagus simple, shaft elongate, cylindrical, strongly curved dorsally and anteriorly, tapering apically with a short acute processes subapically on dorsal surface and a triangular processes on each side slightly distad of midlength; basal apodeme very short; gonopore indistinct, probably apical ( Figs 20–22 ). Segment X very long ( Figs 16, 17 ).

Female unknown.

Distribution. China (Tibet).

Figures

FIGURES 1 – 6. Paradoxivena zhamuensis sp. n. 1, head and thorax, dorsal view; 2, forewing; 3, head and thorax, lateral view; 4, forefemur, anterior surface; 5, face; 6, forefemur, dorsal surface.

FIGURES 7 – 15. Paradoxivena zhamuensis sp. n. 7, foretibia, anterior surface; 8, foretibia, ventral surface; 9, cross section of foretibia; 10, foretibia, dorsal surface; 11, hind tibia, anterior surface; 12, hind tibia, posterior surface; 13, apex of hind tibia, dorsal surface; 14, apex of hind femur, anterior surface; 15, hind tarsomeres and pretarsus, ventral surface.

FIGURES 16 – 22. Paradoxivena zhamuensis sp. n. 16, male genital capsule and segment X, dorsal view; 17, male genital capsule and segment X, lateral view; 18, style and connective, ventral view.; 19, base of aedeagus and dorsal connective, ventral view; 20, aedeagus, style and connective, lateral view; 21, valve and subgenital plate, ventral view; 22, aedeagus, posterodorsal view.