Kakuna Matsumura, 1935

Chen, Xiang-Sheng & Yang, Lin, 2010, Oriental bamboo delphacid planthoppers: three new species of genus Kakuna Matsumura (Hemiptera: Fulgoromorpha: Delphacidae) from Guizhou Province, China, Zootaxa 2344, pp. 29-38 : 30

Kakuna Matsumura, 1935

( Figs 1–34 )

Kakuna Matsumura, 1935: 76 ; Ding, 2006: 404.

Parametopina Yang, 1989: 308 , synonymized by Ding, 2006. Type species. Kakuna kuwayamai Matsumura, 1935 , by original designation.

Diagnosis. Body size relatively large (body length including forewing 5.5–8.0 mm); general color yellowish brown, dorsum with milk-white longitudinal median stripe from middle of vertex, via pro- and mesonotum, posterior margin, to middle of posterior margin of forewing; forewing with large, longitudinal, brown marking (in male, from base of costal margin to apex; in female, from transverse vein to apex); antennae long, reaching level with middle of postclypeus; male pygofer in profile, laterodorsal angle usually produced caudad; dorsal margin of diaphragm produced dorsad in spinous processes; aedeagus long, tubular; genital styles long, closely curving apically.

Description. Body size relatively large, body length (from apex of vertex to tip of forewings): male 5.5– 7.0 mm, female 6.5–8.0 mm.

Coloration. General color yellowish brown, dorsum of body with milk-white longitudinal median stripe from middle of vertex to middle of posterior margin of forewings, distinctly expanding at scutellum and narrow at forewing ( Figs 1, 3 , 12, 14 , 23, 25, 26 ). Forewings with large, longitudinal, brown marking from base of costal area to apex in male ( Figs 3 , 14 , 25 ) and with small, longitudinal, brown marking from transverse vein to apex in female ( Fig. 26 ).

Head. Head ( Figs 1 , 12 , 23 ) including eyes narrower than pronotum (0.79–0.81:1). Vertex broad, as long in median line as broad at base, apically narrower than at base, lateral margins shallowly concave, diverging basally, carinae distinct, submedian carinae originating from middle of lateral margins, uniting at apex, slightly convex outer of apical margin of vertex. Frons ( Figs 2 , 13 , 24 ) relatively long, longer in median line than widest part about 2.28–2.40:1, widest above the level of ocelli, wider at base than at apex, median carina forked at extreme base. Post clypeus long, wider at base than frons at apex. Antennae cylindrical, long, reaching to level with middle of post clypeus, with basal segment longer than wide at apex (about 1.85: 1.00), shorter than second segment (about 0.56: 1).

Thorax. Pronotum ( Figs 1 , 12 , 23 ) shorter than vertex in median line, with lateral carinae incurved, almost reaching to hind margin. Mesonotum distinctly longer in median line than vertex and pronotum together (1.85–1.90: 1), tricarinae, median carina disappearing before scutellum. Forewings ( Figs 3 , 14 , 25, 26 ) long and narrow, longer than widest part (2.93–3.41:1). Hindwings subtriangular, M and Cu1a with long common stem after transverse vein, M+Cu1a not touching Cu1b ( Fig. 15 ). Post tibial spur thin, with 27–30 teeth along hind margin, basal segment of digitus longer than second and third combined (1.70–1.85:1).

Male genitalia. Anal segment of male ( Figs 4, 5 , 16–19 , 28–30 ) deeply sunk into dorsal emargination of pygofer, short, ring-like, process of ventroapical margin present or absent. Pygofer in profile ( Figs 4 , 18 , 29 ) slightly shorter dorsally than ventrally, laterodorsal angle usually strongly produced caudad, posterior margin straight or concave, in posterior view ( Figs 5 , 19 , 30 ) with opening longer than wide, ventral margin broadly concave, without medioventral process. Diaphragm ( Figs 6 , 20 , 31 ) narrow, with dorsal margin produced dorsad in two spinous processes or forked process. Suspensorium ring-like, with broad stalk. Aedeagus ( Figs 8, 9 , 21 , 32, 33 ) tubular, long. Genital styles ( Figs 10, 11 , 22 , 34 ) long, narrowing or tapering to apex, in posterior view ( Figs 5 , 19 , 30 ) both converging apically.

Host plant. Bamboo.

Distribution. Oriental region ( China and Japan) ( Fig. 35 ).

Figures

FIGURE 35. Geographic distribution of Kakuna species: K. kuwayamai Matsumura (♦); K. lii sp. nov. (●); K. nonspina sp. nov. (․); K. yushaniae (Yang, 1989) (ˑ); K. zhongtuana sp. nov. (˔).

FIGURES 1 – 11. Kakuna lii sp. nov. (1) Head and thorax, dorsal view; (2) Frons and clypeus; (3) Forewing (3); (4) Male genital segment, lateral view; (5) Male genital segment, posterior view; (6) Pygofer, posterior view; (7) Suspensorium; (8) Aedeagus and suspensorium, lateral view; (9) Aedeagus, ventral view; (10) Right genital style, lateral view; (11) Right genital style, posterior view. Scale bars = 0.5 mm (Figs 1 – 2, 4 – 6); 2.0 mm (Fig. 3); 0.2 mm (Figs 7 – 11).

FIGURES 12 – 22. Kakuna nonspina sp. nov. (12) Head and thorax, dorsal view; (13) Frons and clypeus; (14) Forewing (3); (15) Hindwing; (16) Male anal segment, ventral view; (17) Male anal segment, lateral view; (18) Male genital segment, lateral view; (19) Male genital segment, posterior view; (20) Diaphragm; (21) Aedeagus, lateral view; (22) Left genital style, lateral view. Scale bars = 0.5 mm (Figs 12 – 13, 18 – 19); 2.0 mm (Figs 14 – 15); 0.2 mm (Figs 16 – 17, 20 – 22).

FIGURES 23 – 34. Kakuna zhongtuana sp. nov. (23) Head and thorax, dorsal view; (24) Frons and clypeus; (25) Forewing (3); (26) Forewing (Ƥ); (27) Hindwing; (28) Male anal segment, lateral view; (29) Male genital segment, lateral view; (30) Male genital segment, posterior view; (31) Diaphragm; (32) Aedeagus, ventral view; (33) Aedeagus, lateral view; (34) Left genital style, lateral view. Scale bars = 1.0 mm (Figs 23 – 24); 2.0 mm (Figs 25 – 27); 0.3 mm (Figs 29 – 30); 0.2 mm (Figs 28, 31 – 34).