Euxaldar guangxiensis, Zhang, Zheng-Guang, Chang, Zhi-Min & Chen, Xiang-Sheng, 2018

Zhang, Zheng-Guang, Chang, Zhi-Min & Chen, Xiang-Sheng, 2018, A new species of the genus Euxaldar Fennah, 1978 from China (Hemiptera, Fulgoroidea, Issidae), ZooKeys 781, pp. 51-58 : 51

Euxaldar guangxiensis sp. n. Figs 1-11, 12-20

Type material.

Holotype: 1 ♂, China: Guangxi, Nonggang National Nature Reserve (E106°58'3", N22°28'37"), 163 m, 29 Oct. 2017, K.K. Liu

Description.

Body length (from apex of vertex to tip of forewing): male 3.8mm; Forewing: male 3.3mm

Coloration. Male: Coryphe (Figure 4) dark brown. Metope light brown yellowish, with pale pustules along its lateral margins. Clypeus (Figure 5) pale brown with dark brown band at base, rostrum and antenna dark brown (Figure 5). Pronotum and mesonotum brown (Figure 4). Forewings (Figure 7) dark brown, each with wide black band at midlength from costal margin to almost apex of clavus and with several light yellow patches including large one in basal part of the wing. Hind wing (Figure 8) dark brown. Legs (Figs 2-3) brown with dark brown markings. Abdomen (Figure 2) dark brown, with margins rufous.

Head and thorax. Coryphe (Figure 4) transverse, approximately 3.0 times wider than long, without carinae, anterior margin nearly straight, posterior margin slightly angularly concave. Metope (Figure 5) flat, 1.1 times longer than widest, without a median carina, with a row of distinct pustules along its lateral margins and rather weak pustules inside. Metopoclypeal suture (Figure 5) incomplete medially. Postclypeus with wide median carina. Pronotum (Figure 4) short, with keel-shaped margins. Paradiscal fields very narrow behind the eyes. Mesonotum (Figure 4) 3.3 times longer than pronotum in midline, with lateral carinae. Fore wings (Figure 7) oval, with smoothed, poorly recognizable reticulate venation; CuP distinct. Hind wings (Figure 8) rudimentary, 0.3 times as long as fore wings, veins obscure. Hind tibiae with 2 lateral teeth near apex. Spinal formula of the hind leg 7-7-2.

Male genitalia. Anal tube (Figs 10, 12, 13) elongate, wide at base part and narrow at apical part, slightly enlarged near apex, apical margin concave medially, laterally with two triangular processes near its middle. Anal column (Figure 12) located near base, 0.3 times as long as the anal tube in dorsal view. Pygofer (Figs 9, 14) in lateral view, with posterior margin distinctly convex. Phallobase asymmetrical, dorsally with three processes at base (Figure 18a, b), middle process of phallobase (Figs 15-16a, 18a) wide, with two teeth apically, lateral processes of phallobase (Figs 15, 16b, 18b) adjacent to middle process hook-shaped. Phallobase laterally with two processes near base, one of them is long and directed caudally (Figure 15c), the other short and directed cephalad (Figure 16d). Lateral phallobase lobes asymmetrical, narrowing apically, one is short directed caudally (Figure 15e), the other is long and curved cephalically (Figs 15f, 16f). Ventral phallobase lobe (Figure 17) not reaching the aedeagal apex, apical margin nearly straight. Connective (Figure 19) in shape of long and narrow cup. Gonostylus (Figure 20) triangular, with moderately convex hind margin, caudo-dorsal angle widely rounded.

Etymology.

The specific name refers to the locality, Guangxi province, China.

Host plant.

Unknown.

Distribution.

China (Guangxi province)

Remarks.

This species resembles E. jehucal and E. lenis , but can be distinguished from the latter in the following characteristics: Anal tube (Figs 10, 12-13) longer than broad, narrowing from half to apex, slightly expanded near apex, apical margin concave medially, laterally with triangular processes; phallobase (Figure 18) with three processes at base in dorsal view, middle process wide (Figs 15, 16a, 18a), with two teeth apically, lateral processes (Figs 15, 16b, 18b) hook-shaped; phallobase laterally with two processes (Figs 15c, 16d); lateral phallobase lobes asymmetrical, narrowing apically, one is short (Figure 15e), the other is long and curved cephalad (Figs 15f, 16f).