Kirbyana furcata 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 furcata Zhi & Chen sp. nov. Figures 4 , 5

Type material.

Holotype: ♂, China: Yunnan Province, Maguan County, Dulong Town, Jinzhuping Village (22°56'N, 104°30'E), 14 August 2017, leg. Yan Zhi, Qiang Luo and Nian Gong; Paratypes: 1♂1♀, Guangxi Zhuang Autonomous Region, Hechi City, Jinchengjiang Park (24°41'N, 108°3'E), 17 July 2015, leg. Ying-Jian Wang.

Description.

Body length: male 4.4-5.3 mm (N = 2), female 5.2 mm (N = 1).

Coloration. General color light brown (Fig. 4A-E ). Eyes blackish brown, ocelli light yellow, semitransparent. Vertex generally yellowish white. Face generally 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, 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; stigma light brown. Hind tibiae yellowish brown and abdominal sternites dark brown.

Head and thorax. Vertex (Figs 4C , 5A ) broad, 1.7 times wider than long; anterior margin truncated, posterior margin arched and recessed. Frons (Figs 4D , 5B ) widest slightly below the level of antennae, 1.1 times as long as wide; frontoclypeal suture nearly concave into an arch; middle carina with basal half absent; lateral carinae distinct and slight elevated. Pronotum (Figs 4C , 5A ) 1.8 times longer than vertex; median carina indistinct, posterior margin nearly at right angle. Mesonotum 1.6 times longer than pronotum and vertex combined. Forewing (Fig. 5C ) 2.5 times longer than wide, with 11 apical and 6 subapical cells; fork Sc+RP basad of fork CuA1+CuA2, first crossvein r-m slightly basad 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: 6/9/9, second segment of hind tarsus with four platellae (Fig. 5D ).

Male genitalia. Pygofer (Fig. 5E, F ) symmetrical, dorsal margin concave and U-shaped, slightly widened towards apex and concaved medially in ventral view; in lateral view, lateral lobes trapezoidally extended caudally, medioventral process round in ventral view. Anal segment (Fig. 5E, G ) broad, dorsal margin almost straight, apical half of ventral margin convex, apical lobes round in lateral view; 1.5 times longer than wide in dorsal view; anal style strap-shaped, not beyond anal segment. Gonostyli (Fig. 5E, 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 transversal. Aedeagus (Fig. 5I-L ) with total of seven processes. On right side, apex of periandrium with a long spinous process, sinuous, apex directed right-ventrocephalically; base of ventral margin with a long furcate process, one ramus large, apex strongly curved and directed dorsocaudally, the other ramus rather small; a shorter curved spinous process on ventral margin near base, apex directed dorsocaudally; apex of periandrium with a medium-sized spinous process, slightly curved and directed ventrocephalically. Endosoma moderately sclerotised, relatively short, generally curved dorsally. Three spinous processes on or near the apex, the right one medium-sized, slightly curved and directed ventrocephalically; the middle one on the dorsal margin, longest and straight, apex directed right-ventrocephalically; the left one extremely short, apex directed cephalad.

Etymology.

The specific name is derived from the Latin word " Kirbyana furcata ", referring to the base of ventral margin of periandrium with a long furcate process.

Host plant.

Bamboo ( Poaceae , Bambuseae ).

Distribution.

China (Guangxi, Yunnan).

Remarks.

This species can be distinguished from the other species of the genus by the following characters: ventral margin of periandrium with three spinous process, two on base and one on apex; apex of periandrium with a long spinous process on the right side; endosoma with three spinous processes on or near the apex.

Figures

Figure 4. Kirbyana furcata 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 5. Kirbyana furcata 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).