Andixius cultratus Wang, Zhi & Chen, 2020

Wang, Xiaoya, Zhi, Yan & Chen, Xiangsheng, 2020, Key to species of the genus Andixius Emeljanov & Hayashi (Hemiptera Fulgoromorpha: Cixiidae) with descriptions of two new species, Zootaxa 4802 (3), pp. 440-448 : 441-444

Andixius cultratus Wang, Zhi & Chen , sp. nov.

Figs 1–21

Diagnosis. The salient features of the new species include: aedeagus ( Figs 10–13 ) with two spinose processes; ventral margin of periandrium with a blade-shaped spinose process at basal 1/3 ( Fig. 13 ); dorsal margin of endosoma with a large spinose process, not furcate ( Fig. 12 ); middle of right part of endosoma with a laminal process ( Fig. 10 ); apical 1/2 of left side and apical part of periandrium with multiple small teeth ( Fig. 11 ).

Measurements. Body length: male 5.9–6.7 mm (N = 24), female 6.6–8.3 mm (N = 16).

Coloration. General color yellowish white ( Figs 1–2 ). Eyes yellow, ocelli faint yellow, semi-translucent. Antenna, vertex, face and rostrum generally yellowish white. Pronotum generally yellowish white. Mesonotum light brown. Forewing semi-translucent, costal vein with three small spaced dark brown spots; slightly behind stigma, middle part of forewings and behind clavus with an irregular puce spot respectively, near claval fork with a triangular yellow spot, basal and middle part of forewings with two inner oblique yellow stripes; apical half of wing with brown patches. Hind tibiae yellow. Ventral abdomen yellowish brown.

Head and thorax. Vertex ( Figs 1, 3 ) 0.9 times wider than long; anterior margin nearly straightly, posterior margin U-shaped recessed, median carina absent. Frons ( Fig. 4 ) 2.9 times as long as wide. Pronotum ( Figs 1, 3 ) 2.4 times longer than vertex; posterior margin recessed in a right angle. Mesonotum 1.4 times longer than pronotum and vertex combined. Forewing ( Figs 2, 5 ) 2.4 times longer than wide, with twelve apical cells and six subapical cells; RP 3 branches, MP with 5 terminals: MP 11, MP 12, MP 2, MP 3, and MP 4, fork MP 1 +MP 2 basad of fork MP 3 +MP 4. Hind tibia with six lateral spines, usually small; chaetotaxy of hind tarsi: 8/8, 2nd hind tarsus with three platellae.

Male genitalia. Pygofer ( Figs 6–7 ) symmetrical, dorsal margin shallowly convex and U-shaped ventrally, widened towards apex, slightly concaved medially; in lateral view, lateral lobes semicircular and extended caudally. Medioventral process in ventral view rounded protruding. Anal segment ( Figs 6, 8 ) flat tubular, dorsal margin almost straight, ventral margin curved slightly in lateral view; 2.2 times longer than wide in dorsal view; anal style strap-shaped, not beyond anal segment. Gonostyli ( Figs 7, 9 ) symmetrical ventrally; in inner lateral view, dorsal margin bending inwards medially, apical margin enlarged slightly. Aedeagus ( Figs 10–13 ) with two processes. Ventral margin of periandrium with a wide spinose process, blade-shaped, slightly curved, of which basal 1/3 longitudinally, directed ventrocephalad; left and right sides of the dorsum with a laminal process, right margin with many small teeth. Dorsal margin of endosoma with a large spinose process, directed dorsocephalad, middle of right part with a laminal process, margin with small teeth, multiple small teeth from and apical 1/2 of left side and apical part of periandrium.

Female genitalia. Tergite IX ( Figs 14, 15, 17 ) moderately sclerotized, with a large nearly elliptical wax plate. Anal segment ( Fig. 16 ) rectangular, widening to apex, 1.1 times wider than long in dorsal view, anal style strapshaped. Gonapophysis VIII ( Fig. 18 ) elongate, and slightly curved upwards. Gonapophysis IX ( Fig. 19 ) with one middle tooth, distance ratio between middle tooth to apex and length of denticulate portion is 2.6. Gonoplac ( Fig. 20 ) rod-like, 4.3 times longer than wide in lateral view. Posterior vagina pattern as shown in Fig. 21 .

Type material. Holotype: ♂, China: Guangdong, Shixing County, Chebaling National Natural Reserve (24°43’N, 114°15’E), 10–13 May 2018, by Meng Jiao and Bin Li; paratypes: 23♂♂ 16♀♀, same data as holotype.

Etymology. The specific name is derived from the Latin adjective “ cultratus ”, referring to the one blade-shaped spinose process arising from the ventral margin of periandrium.

Remarks. This species is similar to Andixius venustus ( Tsaur & Hsu, 1991) in appearance, but differs in: (1) ventral margin of periandrium with a blade-shaped spinose process at basal 1/3 (left side of periandrium with a spinose process in A. venustus ); (2) dorsal margin of endosoma with a large spinose process, not furcate ( A. venustus without process in the same position); (3) middle of right part of endosoma with a laminal process (basal of right side of endosoma with a dichotomous spinose process in A. venustus ); (4) apical 1/2 of left side and apical part of periandrium with multiple small teeth (without process in A. venustus ).

Distribution. China (Guangdong) ( Fig. 43 ).

Figures

FIGURE 43. Geographic distributions of Andixius species.

FIGURES 1–13. Andixius cultratus sp. nov., male 1. Dorsal view; 2. Lateral view; 3. Head and thorax, dorsal view; 4. Face, ventral view; 5. Forewing; 6. Genitalia, lateral view; 7. Pygofer and gonostyli, ventral view; 8. Anal segment, dorsal view; 9. Gonostyli, lateral view; 10.Aedeagus, right side; 11. Aedeagus, left side; 12. Aedeagus, dorsal view; 13.Aedeagus, ventral view. Scale bars: 0.5 mm (1–4, 6–13); 1.0 mm (5).

FIGURES 14–21. Andixius cultratus sp. nov., female 14. genitalia, lateral view; 15. genitalia, ventral view; 16. anal segment, dorsal view; 17. tergite IX, caudal view; 18. Gonapophysis VIII and gonocoxa VIII, dorsal view; 19. gonapophysis IX, lateral view; 20. gonoplac, inner lateral view; 21. posterior vagina, ventral view. Scale bars: 0.5 mm