Kirbyana aspina Zhi & Chen, 2021

Zhi, Yan, Yang, Lin & Chen, Xiang-Sheng, 2021, Two new bamboo-feeding species of the genus Kirbyana Distant, 1906 from China (Hemiptera, Fulgoromorpha, Cixiidae), ZooKeys 1037, pp. 1-14 : 1

Kirbyana aspina Zhi & Chen sp. nov. Figures 1 , 2 , 3

Type material.

Holotype: ♂, China: Hunan Province, Wugang City, Yunshan National Forest Park (26°40'N, 110°37'E), 5 June 2011, leg. Xiang-Sheng Chen; Paratypes: 8♂♂7♀♀, same data as holotype.

Description.

Body length: male 5.6-6.1 mm (N = 9), female 5.9-6.5 mm (N = 7).

Coloration. General color light brown (Figs 1A-E , 3J, K ). Eyes blackish brown, ocelli light yellow, semitransparent. Vertex generally yellowish white. Face generally dark brown; rostrum light brown. Pronotum with discal areas and mesonotum with area between lateral carinae yellowish white, lateral areas brown. Forewing light brown, semi-translucent. Stigma light brown. The basal half dotted with small dark brown spots and distal half with two large dark brown patches; small dark brown spots on the ends of longitudinal veins. Hind tibiae and abdominal sternites yellowish brown.

Head and thorax. Vertex (Figs 1C , 2A ) broad, 2.2 times wider than long; anterior margin truncated, posterior margin arched and recessed. Frons (Figs 1D , 2B ) widest at the level of antennae, as long as wide; frontoclypeal suture nearly concave into an arch; middle carina with basal half absent; lateral carinae distinct and slight elevated. Rostrum distinctly surpassing hind coxae, subapical segment 2.5 times longer than apical segment. Pronotum (Figs 1C , 2A ) 2.4 times longer than vertex; median carina indistinct, posterior margin nearly at right angle. Mesonotum 1.7 times longer than pronotum and vertex combined. Forewing (Fig. 2C ) 2.4 times longer than wide, with 10 apical and 6 subapical cells; fork Sc+RP slightly basad of fork CuA1+CuA2, first crossvein r-m at same level of fork MP, RP two branches, MP with five terminals: MP11, MP12, MP2, MP3 and MP4, fork MP1+MP2 basad of fork MP3+MP4. Metatibiotarsal formula: 6/8-9/9, second segment of hind tarsus with four platellae (Fig. 2D ).

Male genitalia. Pygofer (Fig. 2E, F ) symmetrical, dorsal margin concave and U-shaped, slightly widened towards apex in ventral view; in lateral view, lateral lobes extended in an arc caudally, medioventral process triangular in ventral view. Anal segment (Fig. 2E, G ) broad, dorsal margin almost straight, apical half of ventral margin convex, apical lobes round in lateral view; 1.7 times longer than wide in dorsal view; anal style strap-shaped, not beyond anal segment. Gonostyli (Fig. 2E, F, H ) symmetrical in ventral view; in inner lateral view, base of ventral margin concave, dorsal margin bending inwards at a nearly right angle in the middle, apical part extended, apical margin round. Aedeagus (Fig. 2I-L ) with total of five processes. On right side, apex of periandrium with a long spinous process, sinuous, apex directed right-dorsocephalically; basal 1/4 of ventral margin with two short spinous processes, the longer one straight, directed caudally, the shorter one slightly curved and apex directed ventrocaudally; apical 1/3 of ventral margin with a curved spinous process, apex directed apically. Endosoma moderately sclerotised, relatively short, generally curved dorsally. The left dorsal margin with a long spinous process, slightly curved, and apex directed ventrocephalically.

Female genitalia. Posterior margin of pregenital sternite concave. Tergite IX (Fig. 3A, D ) moderately sclerotised, with length almost equal to width in caudal view. Anal tube (Fig. 3A, C ) short, nearly rectangular, slightly widened towards apex, 1.5 times longer than wide in dorsal view; dorsal and ventral margins nearly straight in lateral view, anal styles strap-shaped. Gonapophysis VIII (Fig. 3E ) elongate, and slightly curved upwards. Gonapophysis IX (Fig. 3F ), distance ratio between middle tooth to apex and length of denticulate portion is 1.50. Gonoplac (Fig. 3G ) rod-like, 3.7 times longer than wide. Posterior vagina (Fig. 3H, I ) elongate. The ventral wall of posterior vagina with two nearly oblong sclerites basally; the dorsal wall with a small long sclerite in the middle aera.

Etymology.

The specific name is derived from the Latin word " Kirbyana aspina ", referring to the apex of left side of periandrium without process.

Host plant.

Bamboo ( Poaceae , Bambuseae ).

Distribution.

China (Hunan).

Remarks.

The male genitalia of K. aspina sp. nov. is similar to K. furcata sp. nov., but differs in: (1) endosoma with one spinous process (endosoma with three spinous processes in K. furcata ); (2) base of ventral margin of the periandrium without a furcate process (base of ventral margin of periandrium with a long furcate process in K. furcata ) (3) apical margin of gonostyli round in lateral view (the latter transversal).

Figures

Figure 1. Kirbyana aspina sp. nov., male A habitus, dorsal view B habitus, lateral view C head and thorax, dorsal view D face, ventral view E head, lateral view. Scale bars: 0.5 mm.

Figure 2. Kirbyana aspina sp. nov., male A head and thorax, dorsal view B face, ventral view C forewing D apex of left hind leg, ventral view E genitalia, lateral view F pygofer and gonostyli, ventral view G anal segment, dorsal view H gonostyli, inner lateral view I aedeagus, right side J aedeagus, left side K aedeagus, dorsal view L aedeagus, ventral view. Scale bars: 0.5 mm (A, B, E-L); 1.0 mm (C).

Figure 3. Kirbyana aspina sp. nov., A-I female A genitalia, lateral view B genitalia, ventral view C anal segment, dorsal view D tergite IX, caudal view E gonapophysis VIII and gonocoxa VIII, ventral view F gonapophysis IX, lateral view G gonoplac, lateral view H posterior vagina, dorsal view I posterior vagina, ventral view J, K mating. Scale bars: 0.5 mm.