Okubasca Dworakowska, 1982

Yu, Xiaofei & Yang, Maofa, 2019, Okubasca Dworakowska (Hemiptera: Cicadellidae: Typhlocybinae: Empoascini) elevated to separate genus status with description of two new species from China, Zootaxa 4609 (2), pp. 395-400 : 396

Okubasca Dworakowska, 1982

Empoasca (Okubasca) Dworakowska, 1982: 53 .

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

Type species: Empoasca okubella Matsumura, 1931

Diagnosis: Body small, green, resembling Empoasca (sensu stricto) in external characters ( Figs 1, 2 , 3,18, 19, 20). Eyes brownish ( Figs 4, 5, 6 , 21, 22, 23 ). Ocelli present. Crown relatively short and broad in dorsal view, narrower than pronotum ( Figs 4 , 21 ). Scutoscutellar sulcus not reaching lateral margin ( Figs 4 , 21 ). Forewing semi-transparent, RP and MP’ unstalked, both arising from r cell, r cell longer than m cell, ScP+RA present ( Figs 1, 7 , 18, 24 ); hindwing transparent, with CuA unbranched ( Figs 2, 8 , 19, 25 ).

Basal sternal abdominal apodemes parallel-sided, almost reaching segment IV ( Figs 9 , 26 ). Male pygofer triangular, elongate, apical half strongly narrowed to apex, bearing few rigid microsetae on each side of lobe and few additional rigid microsetae on ventral margin, ventral margin short, dorsal bridge short ( Figs 10, 12 , 27, 29 ). Subgenital plate longer than pygofer, basal half broader than apical half, group A poorly differentiated, outer margin bearing numerous group B setae, group C with few macrosetae arranged in irregular row, group D setae sparse ( Figs 11 , 28 ). Paramere bearing few apical teeth and microsetae ( Figs 13 , 30 ). Aedeagus shaft longer than preatrium, plate apex fuscous (Dworakowska, 1982; Southern, 1982), gonopore at apex ( Figs 14, 15 , 31, 32 ). Anal tube process longer than half height of pygofer, apex pointed ( Figs 10, 16 , 27, 33 ). Connective developed, base broader than apex ( Figs 17 , 34 ).

Remarks: Although Okubasca resembles Empoasca (s.s.) in size, coloration and body proportions, it differs in several important respects, including: male pygofer lobe with additional rigid microsetae at ventral margin ( Figs 10, 12 , 27, 29 ), ventral pygofer appendage short ( Figs 10, 12 , 27, 29 ); subgenital plate apex strongly tapered, apex fuscous, with rigid marginal setae (group B) extended along nearly entire outer margin, group A not differentiated ( Figs 11 , 28 ); aedeagus with preatrium well developed but little or no longer than shaft and forming angle of 90º or less with shaft in lateral view ( Figs 14, 15 , 31, 32 ) (Dworakowska, 1982; Liu et al., 2011). All mentioned characteristics are unique and stable, so we proposal to elevate Okubasca to status as a separate, valid genus.

Distribution: China (Yunnan, Guangxi, Anhui, Guizhou and Zejiang), Japan.

Figures

FIGURES 1–17. Okubasca convoluta Yu & Yang, sp. nov., 1. Whole body, dorsal view; 2. Whole body, ventral view; 3. Whole body, lateral view; 4. Head and thorax, dorsal view; 5. Face; 6. Head and thorax, lateral view; 7. Forewing; 8. Hindwing; 9. Abdominal apodemes, ventral view; 10. Male terminalia, lateral view; 11. Subgenital plate, ventral view; 12. Pygofer side, dorsal view; 13. Paramere, lateral view; 14. Aedeagus, dorsal view; 15. Aedeagus, lateral view; 16. Anal tube process, lateral view; 17. Connective. Scale bars: 1–8 (0.5 mm); 9–17 (0.1 mm).

FIGURES 18–34.Okubasca paracalvata Yu & Yang, sp. nov., 18. Whole body, dorsal view; 19. Whole body, ventral view; 20. Whole body, lateral view; 21. Head and thorax, dorsal view; 22. Face; 23. Head and thorax, lateral view; 24. Forewing; 25. Hindwing; 26. Abdominal apodemes, ventral view; 27. Male terminalia, lateral view; 28. Subgenital plate,ventral view; 29. Pygofer side, dorsal view; 30. Paramere, lateral view; 31. Aedeagus, lateral view; 32. Aedeagus, dorsal view; 33. Anal tube process, lateral view; 34. Connective. Scale bars: 18–25 (0.5 mm); 26–34 (0.1 mm).