Kakuna nonspina, Chen, Xiang-Sheng & Yang, Lin, 2010

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 : 33-34

Kakuna nonspina sp. nov.

( Figs 12–22 )

Description. Body length (from apex of vertex to tip of forewings): male 5.80–5.95 mm (N = 23); female 6.25–6.55 mm (N = 3).

Coloration. General color yellowish brown to brown. Ocelli reddish brown, eyes black brown. Clypeus with lateral regions slightly dark. Rostrum with apex fuscous. Antennae yellowish brown, except apex of basal segment and base of second segment, fuscous. Forewing ( Fig. 14 ) pale yellowish brown, with a large, longitudinal, fuscous marking from base of costal area to apex in male, apex of I A with a blackish brown marking. Thorax with lateral and ventral areas brown, fore and median legs brown, hind legs yellowish white, except apex of digitus fuscous. Abdomen fuscous, except posterior margin of each segment yellowish brown, genital segment fuscous.

Head and thorax. Vertex including eyes narrower than pronotum (0.79:1). Vertex shorter in middle line than wide at base (0.64:1), broad at apex narrower than at base (0.78:1). Frons longer in middle line than wide at widest part (about 2.28: 1). Antennae with basal segment 1.87 times as long as broad at apex, shorter than second segment (0.56:1). Pronotum slightly shorter in middle line than vertex (0.89:1). Mesonotum 1.62 times as long as vertex and pronotum together in middle line. Forewings longer in middle line than broad at widest part (3.35:1). Post-tibial spur with about 30 teeth along hind margin. Basal segment of digitus longer than second and third combined (1.85:1).

Male genitalia. Anal segment of male ( Figs 16, 17 ) almost sunk in the emargination of pygofer, ventral margin with two spine-like processes connected at base. Pygofer in profile ( Fig. 18 ) with dorsal margin shorter than ventral margin, laterodorsal angle strongly produced caudad, posterior margin broadly concave; in posterior view ( Fig. 19 ) with opening longer than wide, ventral margin broadly concave. Suspensorium ring-like. Aedeagus in profile ( Fig. 21 ) tubular, straight, apex rounded. Diaphragm ( Fig. 20 ) with dorsal margin broadly produced dorsad, median part with two spine-like processes, which far from each other at base, converging medially, and then curving laterad apcially. Genital style in profile ( Fig. 22 ) narrowing apically, two lateral margins sinuate, apex subquadrate, with two small processes at outer margin and one at inner margin apically.

Type material. Holotype: 3, China: Guizhou, Jiangkou, Fanjingshan National Natural Reserve (27˚55´N, 108˚41´), Jinding, 2200 m, 31 May 2002, X.-S. Chen; paratypes: 19 3, 1 Ƥ, same data as holotype; 1 3, 1 Ƥ, Fanjingshan National Natural Reserve, Huixiangping, 1800m, 4 Jul. 1998, X.-S. Chen; 1 3, 1 Ƥ, Fanjingshan National Natural Reserve, 500-800 m, 1 Jun. 2002, X.-S. Chen; 1 3, Guizhou, Leishan, Leigongshan National Natural Reserve (26°28´N, 108°17´E), 1900 m, 2 Aug. 2004, Q.-Z. Song, D.-Y. Ge and Q.-R. Liao.

Host plant. Bamboo [ Sinobambusa kunishii (Hayata) Naki ].

Distribution. Southwest China (Guizhou: Jiangkou, Leishan) ( Fig. 35 ).

Remarks. This new species is distinctly distinguished from other species of genus Kakuna by: i) anal segment having processes at ventral margin; ii) processes of diaphragm long, separated at base; iii) aedeagus in profile straight, tubular, without any process; iv) genital styles with apex subquadrate, having three small processes.

Etymology. The specific name is a combination of the Latin words “non” (no) and “spina” (spine), meaning that aedeagus without any spinous process.

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 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).