Andixius truncatus Wang & Chen, 2023

Wang, Xiao-Ya, Zhi, Yan, Yang, Lin & Chen, Xiang-Sheng, 2023, Four new species of the genus Andixius Emeljanov & Hayashi (Hemiptera, Fulgoromorpha, Cixiidae) from China, ZooKeys 1141, pp. 149-168 : 149

Andixius truncatus Wang & Chen sp. nov.

Figs 1G, H , 9A-C , 10A-H , 11A-H

Type material.

Holotype: ♂, China: Guangxi Province, Longsheng County, Huaping National Natural Reserve (25.6046°N, 109.9417°E), 18 July 2020, Xiaoya Wang, Yongjin Sui, Zhicheng Zhou and Jing Wang leg.; Paratypes: 9♂♂ 5♀♀, same data as holotype.

Description.

Body length: male 6.56-7.20 mm (n = 10), female 7.25-8.86 mm (n = 5).

Coloration. General color black-brown (Figs 1G, H , 9A, B ). Eyes yellowish brown, ocelli faintly yellow, semitranslucent. Lateral margin of frons yellowish white, behind eyes with two brown spots. Antenna, vertex, face, and rostrum fawn. Pronotum fawn. Mesonotum yellowish brown. Forewing semitranslucent, generally black-brown; stigma fawn; veins and tubercles the same color as the wing surface; slightly below stigma and near claval fork with an irregular, yellowish-white spot; apical half of wing light brown. Hind tibiae yellowish brown. Ventral abdomen yellowish brown.

Head and thorax. Vertex (Figs 1G , 9A ) 2.76 times longer than wide; anterior margin slightly curved recessed, posterior margin U-shaped, recessed; lateral carinae developed; median carina absent. Frons (Fig. 9B ) claviform, 3.00 times as long as wide. Pronotum (Figs 1G , 9A ) slightly shorter than vertex. Mesonotum 1.08 times slightly longer than pronotum and vertex combined, lateral carinae curved outwards. Forewing (Figs 1H , 9C ) 2.74 times longer than wide, with 12 apical cells and seven subapical cells; RP 3 branches, MP with five terminals: MP11, MP12, MP2, MP3, and MP4, fork MP1+MP2 basad of fork MP3+MP4. Hind tibia with four lateral spines; chaetotaxy of hind tarsi 8/8.

Male genitalia. Pygofer (Fig. 10A, C ) symmetrical. Medioventral process rounded protruding in ventral view. Anal segment (Fig. 10A, D ) tubular, dorsal margin almost straight, ventral margin slightly curved, right lobe larger than left lobe in lateral view; 1.81 times longer than wide in dorsal view; anal style strap-shaped, not beyond anal segment. Gonostyli (Fig. 10B, C ) symmetrical ventrally, inner margin with a small process near base; in lateral view, apex enlarged and foot-shaped. Aedeagus (Fig. 10E-H ) with three processes. In left side view, apex of periandrium with laminal process, apex rounded; in right side view, ventral margin of periandrium with a long, broad laminal process, apex truncated, margin with small teeth, directed cephalad, with endosoma curving ventrally at a right angle; in dorsal view, base of endosoma with a long spinose process, slightly curved, directed dorsocephalad.

Female genitalia. Tergite IX (Fig. 11A, B, D ) moderately sclerotized, with a large, nearly circular wax plate. Anal segment (Fig. 11C ) rectangular, 1.60 times longer than wide in dorsal view, anal style linguiform. Gonapophysis IX (Fig. 11F ) with one middle tooth; distance ratio between middle tooth to apex and length of denticulate portion is 2.70. Gonoplac (Fig. 11G ) rod-like, 4.3 times longer than wide in lateral view. Posterior vagina pattern as shown in Fig. 11H .

Distribution.

China (Guangxi) (Fig. 12 ).

Etymology.

The specific name is derived from the Latin adjective truncatus, referring to the ventral margin of periandrium with a long, broad laminal process having a truncated apex.

Remarks.

This species can be distinguished from the other Andixius species by the following characters: forewing general black-brown, with an irregular yellowish-white spot slightly below stigma and near claval fork; ventral margin of periandrium with a long and broad laminal process, apex truncated, margin with small teeth; endosoma curving ventrally in right angle, base of dorsal margin with a long spinose process.

Figures

Figure 1. New species of Andixius A, B A. flagellihamus sp. nov., male A dorsal view B lateral view C, D A. gracilispinus sp. nov., male C dorsal view D lateral view E, F A. productus sp. nov., male E dorsal view F lateral view G, H A. truncatus sp. nov., male G dorsal view H lateral view. Scale bars: 0.5 mm.

Figure 9. Andixius truncatus sp. nov., male A head and thorax, dorsal view B face, ventral view C forewing. Scale bars: 0.5 mm (A, B); 1.0 mm (C).

Figure 10. Andixius truncatus sp. nov., male A genitalia, lateral view B gonostyli, lateral view C pygofer and gonostyli, ventral view D anal segment, dorsal view E aedeagus, right side F aedeagus, left side G aedeagus, dorsal view H aedeagus, ventral view. Scale bars: 0.5 mm.

Figure 11. Andixius truncatus sp. nov., 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, dorsal view F gonapophysis IX, lateral view G gonoplac, inner lateral view H posterior vagina, ventral view. Scale bars: 0.5 mm.

Figure 12. Geographic distribution of Andixius species.