Andixius trifurcus Zhi & Chen

Zhi, Yan, Yang, Lin, Zhang, Pei & Chen, Xiang-Sheng, 2018, Two new species of the genus Andixius Emeljanov & Hayashi from China (Hemiptera, Fulgoromorpha, Cixiidae), ZooKeys 739, pp. 55-64 : 58-61

Andixius trifurcus Zhi & Chen sp. n. Figs 3-4, 17-28

Type material.

Holotype: ♂, China: Yunnan, Lushui County, Pianma Town (26°N, 98°36'E), 17-19 June 2011, Jian-Kun Long; paratypes: 4♂♂5♀♀, same data as holotype, Jian-Kun Long, Yu-Jian Li; same collecting site as holotype, 14 August 2006, Pei Zhang.

Description.

Body length: male 6.4-6.8mm (N = 5), female 7.9-8.2mm (N = 5); forewing length: male 5.4-5.9 mm (N = 5), female 7.1-7.3 mm (N = 5).

Coloration. General color yellowish brown (Figs 3-4). Eyes brown, ocelli faint yellow, semi-translucent. Antenna blackish brown. Vertex generally blackish brown with two short longitudinally yellow strips. Face generally brown. Postclypeus yellowish brown, rostrum yellowish brown except for apex dark brown. Pronotum with discal area light yellowish brown and lateral areas yellowish brown. Mesonotum brown. Forewing similar to Andixius longispinus sp. n., but without a tan spot near claval fork and distal half of forewing with larger brown patches. Hind tibiae and ventral abdomen yellowish brown.

Head and thorax. Vertex (Figs 3, 17) almost equal to width; anterior and posterior margin recessed in acute angle, median carina absent. Frons (Fig. 18), 2.6 times as long as wide. Pronotum (Figs 3, 17) 1.5 times longer than vertex; posterior margin recessed in a right angle. Mesonotum 1.4 times longer than pronotum and vertex combined. Forewing (Figs 4, 19) 2.3 times longer than wide, with twelve apical cells and seven subapical cells. Hind tibia with six lateral spines, chaetotaxy of hind tarsi: 6/6, 2nd hind tarsus with two platellae.

Male genitalia. Pygofer (Figs 21-22) symmetrical, dorsal margin shallowly concave and U-shaped ventrally, widened towards apex; in lateral view, lateral lobes trapezoidal and extended caudally. Medioventral process round in ventral view. Anal segment (Figs 21, 23) with dorsal margin nearly straight, ventral margin with an antler-like process extending to apex ventrally in lateral view; 1.6 times longer than wide in dorsal view; anal style strap-shaped, slightly beyond anal segment. Genital styles (Figs 21, 24) symmetrical ventrally, inner margin with a small odontoid process medially and an obtuse process near apex, gradually widened towards apex; dorsal and ventral margins subparallel, apical part strongly bent upward and apical margin truncated in lateral view. Aedeagus (Figs 25-28) with five large processes. Dorsal margin of aedeagus near apex with a long process, slightly directed ventrocephalically. Periandrium with an expanded semi-enclosed structure around the left side and ventral margin of periandrium, ventral margin of the expanded structure with three long processes: apical one wide, slightly curved and directed cephalically; middle one longest, narrowed from base to end, curved upwards and directed dorsocephalically; basal one wide, slightly curved and directed ventrocephalically. A slender process arising from apical 1/3 of left side of periandrium, directed ventrocephalically. Flagellum short and small, slightly sclerotized, without process.

Distribution.

China (Yunnan) (Fig. 29).

Etymology.

The specific name is derived from the Latin prefix tri- plus the Latin word furcus, referring to the trifurcated ventral margin of the periandrium.

Remarks.

This species is similar to Andixius longispinus sp. n. in appearance, but differs in: (1) dorsal margin of aedeagus with a long process near apex ( A. longispinus without process in the same position); (2) periandrium with an expanded semi-enclosed structure around left side and ventral margin of periandrium (not as above in A. longispinus ); (3) flagellum without process (two processes in A. longispinus ).