Okubasca Dworakowska, 1982

Empoasca (Okubasca) Dworakowska, 1982: 53 .

Empoasca (Okubasca), Liu et al., 2011: 59–64 .

Okubasca Dworakowska, 1982, Yu and Yang, 2019: 395; Xu et al., 2021: 280.

Type species: Empoasca okubella Matsumura, 1931 .

Diagnosis. Body robust (Figs 1, 2). Head including eyes narrower than pronotum (Figs 1, 3). Coronal suture distinct, extending beyond crown midlength (Figs. 1, 3). Face short, convex in lateral view, lateral frontal suture distinct; anteclypeus slightly convex, not expanded (Fig. 4). Pronotum large (Figs 1, 3). Forewing narrow, rounded apically, apical cells occupying nearly one-fourth total length, veins R2 and RM dissociated at their bases, both arise from r cell; MCu arising from m cell, c and r cells nearly equal in width, both narrower than m and cua cells (Fig. 5). Hindwing with CuA unbranched (Fig. 6). Front femur seta AM1 stout, situated near ventral margin; intercalary row with two large basal seta and five smaller setae more distad. Hind femur with macrosetal formula 2+1+1. Hind-tibia row AV with five preapical macrosetae.

Male 2S abdominal apodemes well developed (Fig. 7). Male pygofer elongate, apical half narrowed to apex, bearing few rigid microsetae on each side of lobe and few additional rigid microsetae on ventral margin, ventral appendage present(Fig. 8). Subgenital plate surpassing pygofer lobe, darked apically, basal setae poorly differentiated, marginal setae well-developed, almost continuous along entire length of dorsolateral margin of plate, macrosetae starting at one-fourth distance from base arranged in two rows, apical setae in one row, feeble microsetae sparse (Figs 8, 9, 17). Style bearing few apical teeth and microsetae (Figs 15, 16). Aedeagus with preatrium present, usually long and somewhat arcuate; shaft tubular, well sclerotized, curved dorsad, without processes; gonopore ventrad at apex (Figs 8, 12, 13). Anal tube weakly sclerotized, with basolateral appendage variably developed (Figs 8, 10, 11).

Distribution: China (Yunnan and Zhejiang Provinces), Japan.