Wyuchiva, Zhang & Wei & Webb, 2006

Zhang, Yalin, Wei, Cong & Webb, M. D., 2006, A new stegelytrine leafhopper genus from China and Thailand (Hemiptera: Cicadellidae), Zootaxa 1333 (1), pp. 55-62 : 57-58

Wyuchiva gen. n.

Type species. Wyuchiva elegantula sp. n.

Etymology. The generic name is an arbitrary combination of letters. Gender is female.

Diagnosis. Externally the new genus is similar to Temburocera Webb (see introduction) but can be distinguished from the latter by the following characters: 1) lateroapical areas of clypellus depressed; 2) transverse suture between clypellus and clypeus curved ventrally rather than dorsally; 3) apical margin of clypellus less incurved; 4) scutellum without distal extension; and 5) forewing appendix absent (present but very reduced in Temburocera ). The female pregenital sternite and various structures of the male genitalia are also distinctive (see Introduction).

Descriptions. Head nearly as wide as pronotum, eyes encroaching onto pronotum laterally. Vertex distinctly shorter than width between eyes, smooth; fore and hind margin subparallel; coronal suture extending to apex of head, or obscure. Face slightly longer than broad, lateral margins not incurved below eyes; clypeus relatively narrow, shagreen ventrally, extended dorsally to an imaginary line from below ocellus diagonally to midlength of clypeus, thereafter smooth; clypellus broad and swollen, lateroapical areas depressed (more so in male), apical margin slightly concave; transclypeal suture curved ventrally; lora narrow (more so in male); gena finely rugose, a fine seta adjacent clypeus above lora; rostrum fairly short, extending to apex of fore trochanter, narrow; labrum elongate, extending to near apex of labium; antennae very long, extending to approximately apex of forewing, arising adjacent to lower corner of eye; antennal ledge distinct; laterofrontal suture extended above and laterad of corresponding ocellus; ocelli situated approximately their own diameter from adjacent eye. Pronotum with medial length short, lateral margin short without dorsopleural carina; smooth. Scutellum more or less flat; basal margin about as broad as head; basal width slightly longer than lateral margin; transverse suture slightly depressed. Forewing with five apical cells; middle and outer subapical cells closed; crossvein m-Cu 2 missing; claval veins united by crossvein and a crossvein present between inner claval vein and claval suture; appendix absent. Hind wing with four apical cells. Hind femur long, reaching eye in resting position; apex with setal formula 2+2+1, setae not elevated on strong bases. Hind tibia with four rows of well developed setae, macrosetae on dorsal surface of hind tibiae between two longitudinal rows and other extra setae (present in many Stegelytrinae ) absent.

Male pygofer short with row of macrosetae at dorsal margin and posterior half with sparse short setae in dorsal view; dorsal transverse sclerotised area very short in lateral view; posterodorsal margin with internal fold (indicated by broken line in Fig. 18); elongate internal lateral process from base of Xth segment, directed posteroventrally, basally coalesced with pygofer side; narrow oblique hyaline band dorsomedially, and strongly sclerotised slightly curved band adjacent to base of subgenital plate directed dorsad towards pygofer process, area posterior to latter band membranous; irregular hyaline band along ventral margin adjacent valve and bordering the strongly sclerotised band. Xth segment very short, sclerotised dorsally and laterally. Valve subrectangular. Subgenital plates ligulate, fused to each other basally and with pair of laterobasal processes articulating with pygofer; a group of ventral macrosetae centrally to near apex; apical and ventral margin infolded (indicated by broken line in Fig. 18), with a row of very short spine-like setae apically. Connective ‘Y’-shaped, lateral arm well developed, basal area between lateral arms membranous. Inner basal arm of paramere very short, outer basal arm very long; apical process straight, tapered to apex; inner margin subapically with a small heel-like process and a large process separated by a hyaline band, each process with a few short fine setae. Aedeagal shaft moderately robust, laterally compressed with a subapical flangelike expansion on each side; apex bifurcate, gonopore subapical on anterior surface; basal apodeme bifurcate with arms curved laterally.

Female pregenital sternite with deep longitudinally incision exposing valvifers (Fig. 6), in dry specimens forming broad cleft, trilobed basally (Fig. 7).