Hylica Stål

Tang, Jiu & Zhang, Yalin, 2018, Review of the leafhopper genus Hylica Stål (Hemiptera: Cicadellidae: Hylicinae) with description of one new species, Zootaxa 4388 (4), pp. 526-536 : 527

Genus Hylica Stål new record to China

Hylica Stål, 1863: 593 ; Marschall, 1873: 367; Scudder, 1882: 156; Atkinson, 1885: 112; Distant, 1908: 252; Evans, 1946: 47; 1947: 165; Metcalf, 1962: 6; Oman et al., 1990: 218.

Type species: Hylica paradoxa Stål, 1863 , by original designation

Diagnosis. This genus can be easily distinguished from other genera of the subfamily Hylicinae by the strongly tuberculate head, pronotum and scutellum, and the oblong-obovate abdomen with dentate lateral margins.

Description. Medium-sized to large leafhoppers (body length 6.6–11.5 mm incl. tegmen) with coloration brown-black. Body oblong-obovate and densely covered with many small dark and few light setae. Head, pronotum and scutellum strongly tuberculate. Vertex ( Figs. 4 , 13 , 23 ) acutely produced and resembling isosceles triangle slightly longer than wide with apical declivous process in lateral view; distal half of crown with median longitudinal ridge; ocelli situated on two tubercles of vertex near anterior angles of eyes, closer to eyes than to each other; pair of tubercles sinuated between ocelli and apex; tubercle in front of eye well developed and shelflike before eye in dorsal view; posterior margin straight and with pair of light spots. Face ( Figs. 6 , 15 ) irregular; frons bent forwards; frontoclypeal area slightly convex and with strongly developed muscle impressions; clypeal sulcus obvious; anteclypeus distinctly convex and extended slightly beyond gena; lorum small and narrow, well-separated from lateral margin of gena; gena with lateral margin evenly rounded below eye; almost completely concealing proepisternum; rostrum very short, just reaching base of front coxa; antenna shorter than length of crown; antennal ledge well developed. Pronotum ( Figs. 4, 5 , 13, 14 , 23, 24 ) backwardly elevated and sloping laterally, tuberculate; posterior margin with “w” shaped emargination. Exposed part of mesonotum and scutellum ( Figs. 7, 8 , 16, 17 , 23, 24 ) divided into three parts; anterior region disklike with some tubercles; middle region elevated with center sunken; posterior region lower than middle region, furnished near apex with conical tubercle and not reaching apex of clavus. Tegmina subcoriaceous; with four apical cells; appendix well developed and extended around wing apex. Abdomen ( Figs. 9 , 18 ) broader than tegmina at rest; strongly depressed and with lateral margins expanding into dentations. Legs somewhat short and usually with pale spots; front tibia above somewhat dilated and compressed; hind tibia above with spine-like setal bases; hind femur macrosetal formula 2+0+0; tibia with ca. 9, 8 setae in rows AD, PD, respectively.

Male genitalia: Pygofer ( Figs. 25–27, 32 , 37–39, 46, 47 ) lateral lobe without appendage, with many small stout setae, pygofer urn-shaped in dorsal view, base fused, terminal separated into two parts; genital valve almost degenerate and fused with subgenital plate; subgenital plate short, about half length of pygofer side, strawberryshaped; base of anal tube with pair of long, slender anal hooks almost reaching shaft apex of aedeagus. Base of style ( Figs. 31, 35 , 40, 45 ) elongate, apophysis of style very simple and short. Connective ( Figs. 31, 35 , 40, 45 ) Yshaped, stem longer than arms. Aedeagus ( Figs. 29, 30, 34, 36 , 41–44 ) with preatrium and dorsal apodeme, shaft almost straight, gonopore subapical on ventral surface.

Female genitalia. Female with sternite VII concave medially ( Figs. 48, 55 ). Ovipositor not protruding far beyond pygofer apex ( Figs. 49, 56 ). First valvula ( Figs. 50, 51, 57, 58 ) draped in middle and subapical region; width same throughout most of length, basal half short and nearly straight, distal half slightly curved upward; dorsal sculpturing pattern strigate to reticulate, submarginal for most of length. Second valvula ( Figs. 52, 53, 59, 60 ) curved; with toothed distal blade about or slightly more than half total length, apparently broadened, with or without a few small, somewhat irregular teeth. Third valvula ( Figs. 54, 61 ) with a row of small setae.

Ecology. This genus is arboreal and occurs generally in moist tropical forests although almost no observations have been made of live individuals.

Distribution. China, Nepal (Bengal, Kathmandu), Borneo, Burma, India (Assam), Thailand, Viet Nam, West Indonesia; Java, Laos (Vientiane).

Figures

FIGURES 1–9. Hylica paradoxa Stål, male: 1. Habitus, dorsal view; 2. Habitus, lateral view; 3. Habitus, ventral view; 4. Head and pronotum, dorsal view; 5. Head and pronotum, lateral view; 6. Face, ventral view; 7. Scutellum, lateral view; 8. Scutellum, dorsal view; 9. Female abdomen, dorsal view.

FIGURES 10–18. Hylica scutealba sp. n., male: 10. Habitus, dorsal view; 11. Habitus, lateral view; 12. Habitus, ventral view; 13. Head and pronotum, dorsal view; 14. Head and pronotum, lateral view; 15. Face, ventral view; 16. Scutellum, lateral view; 17. Scutellum, dorsal view; 18. Female abdomen, dorsal view.

FIGURES 19–24. 19–20, Hylica paradoxa Stål, female: Habitus, dorsal view. 21–24, Hylica scutealba sp. n., 21–22, female: Habitus, dorsal view; 23–24, male: 23. Head, pronotum and scutellum, dorsal view; 24. Head, pronotum and scutellum, lateral view.

FIGURES 25–36. 25–31, Hylica scutealba sp. n., male: 25. Genital capsule, posterior view; 26. Genital capsule, dorsal view; 27. Pygofer side, lateral view; 28. Sternite VII-VIII, ventral view; 29. Aedeagus, lateral view; 30. Aedeagus, dorsal view; 31. Connective and style, dorsal view. 32–36, Hylica paradoxa Stål, male: 32. Pygofer side, lateral view; 33. Sternite VII-VIII, ventral view; 34. Aedeagus, dorsal view; 35. Connective and style, dorsal view; 36. Aedeagus, connective and style, lateral view.

FIGURES 37–47. 37–42, Hylica scutealba sp. n., male: 37. Genital capsule, dorsal view; 38. Genital capsule, ventral view; 39. Pygofer side, lateral view; 40. Connective and style, ventral view; 41. Aedeagus, ventral view; 42. Aedeagus, connective and style, lateral view. 43–47, Hylica paradoxa Stål, male: 43. Aedeagus, ventral view; 44. Aedeagus, lateral view; 45. Connective and style, ventral view; 46. Genital capsule, dorsal view; 47. Pygofer side, lateral view.

FIGURES 48–61. 48–54, Hylica scutealba sp. n., female: 48. Sternite VI–VII, ventral view; 49. Pygofer, dorsal view; 50. First valvula; 51. Apex of first valvula; 52. Second valvula; 53. Apex of second valvula; 54. Third valvula. 55–61, Hylica paradoxa Stål, female: 55. Sternite VI-VII, ventral view; 56. Pygofer, dorsal view; 57. First valvula; 58. Apex of first valvula; 59. Second valvula; 60. Apex of second valvula; 61. Third valvula.