Yangiella montana Zhang, Bai, Heiss & Cai

Zhang, Wenjie, Bai, Xiaoshuan, Heiss, Ernst & Cai, Wanzhi, 2010, Notes on Yan gie l la Hsiao (Hemiptera: Aradidae: Mezirinae), with description of a new species from China, Zootaxa 2530, pp. 29-38 : 34-36

Yangiella montana Zhang, Bai, Heiss & Cai sp.n.

( Figs. 16–30 )

Description. Colour: Body reddish brown to blackish brown. Eyes reddish. Membrane blackish, 4 (2+2) spots at basal regions pale.

Structure: Head, pronotum, scutellum, pygophore, antennae and legs covered with granules, deltg rugose. Anterior process of head slightly exceeding apex of first antennal segment; genae longer than clypeus and forming a small notch at apex, lateral margins subparallel; antenniferous tubercles dentiform, divergent anteriorly; clypeus raised; vertex broad, slightly raised, flanked by 2 (1+1) ovate impressions; postocular tubercles dentiform, reaching to outer margin of eyes. Antennae 1.94 times as long as width of head across eyes; first segment shortest, second shorter than fourth, third longest; first stout, clavate; second and third tapering toward base, fourth fusiform, thicker than third segment with pilose apex ( Figs. 16 , 17); rostrum reaching to limits of rostral groove, the latter is ovate, deep, wide and open posteriorly (Fig. 18). Pronotum 2.3 times as wide as long at midline; anterior angles broadly rounded, slightly expanded, not exceeding collar; lateral margin concave anteriorly; anterior part of disc with a median depression flanked by 4 (2+2) large lunate callous spots, laterad with 2 (1+1) longitudinal short ridges, inner side of ridges with 4 (2+2) small ovate callosities; posterior part rather flat, humeri raised. Scutellum carinate at base, lateral margins sinuate and carinate, disc rugose with a longitudinal carina. Hemelytra reaching posterior margin of tergite VII; inner posterolateral angle of corium not reaching to the tip of scutellum; veins distinct and anastomosing. Legs slender, femora moderately inflated, tibiae cylindrical, nearly straight, preapical comb on fore tibia present, claws with thin pulvilli. Deltg with glabrous spots as usual, separated from tergal plate by a thin longitudinal carina; lateral margins of deltg II-VI nearly straight; that of deltg VII slightly sinuate, its posterolateral angle rounded. Paratergites VIII of male lobular, reaching to 2/3 of pygophore; of female broad lobe reaching to 2/3 of tergite IX ( Figs. 16 , 19). Prosternum flattened, separated from mesosternum by a suture; mesosternum with shallow longitudinal impression, basal margin carinate; metasternum flattened, separated from mesosternum by a thin suture. Sterna III to VI flattened medially, anterior parts shallowly depressed with 2 (1+1) round callous spots, near posterior margins with median smooth spots, laterad with 4 (2+2) smaller round ones; sternum VII of male raised medially, anteriorly shallowly depressed with median short carina, flanked by 2 (1+1) ovate carinae (Figs. 20, 21). Spiracles II–VII ventral, remote from lateral margins, VIII sublateral and not visible from above in male; lateral and visible from above in female (Figs. 19–21). Pygophore cordate, surface anteriorly with a triangular shallow impression, posterolateral margins constricted (Figs. 22–24). Paramere with an angulate apex ( Figs. 25–27 ). Basal plate thick. Capitate process ovate. Strut large ( Figs. 28– 30 ). Terminal segments of abdomen of female as in Figs. 19, 20.

Measurements [in mm, ď (n=6)/Ψ (n=3), holotype in parentheses]. Body length 6.8–7.2/7.2–7.5 (7.2); maximal width of abdomen 2.5–2.6/2.7–2.9 (2.6). Length head 0.96–1.02/1.12–1.15 (1.02); width 0.96–0.99/ 1.02–1.09 (0.99). Length pronotum 0.92–0.96/0.96–1.06 (0.96); width 2.08–2.21/2.18–2.30 (2.21). Length scutellum 0.98–1.12/1.12–1.24 (1.12); width 1.44–1.47/1.44–1.50 (1.44). Length antennal segments I–IV = 0.35–0.38, 0.42–0.45, 0.51–0.58, 0.48–0.51/0.38–0.42, 0.45–0.48, 0.54–0.61, 0.51 (0.38, 0.45, 0.58, 0.51).

Material examined: Holotype: ď, China, Yunnan, Jinping, 19.V.2009, X. S. Bai leg ( CAU). Paratypes: 2 ď, 2 Ψ, same data as for holotype; 2 ď, 1 Ψ, China, Yunnan, Lvchun, N 22° 56.625 E 102°17.785, 1791 m; 16.V.2009, X. S. Bai leg; 2 Ψ, China, Yunnan, Pingbian, Daweishan N 22° 59.405 E 103°41.072, 1333 m; 23.V.2009; X. S. Bai leg (coll. E. Heiss); 1 ď, China, Guangxi, Longsheng, 12.VIII.2005, X. S. Bai leg ( CAU).

Etymology: The specific name refers to its montane habitats.

Distribution: China (Guangxi, Yunnan).

FIGURES 17–22. Yangiella montana sp. n. 17, 18, 21, 22, ♂, 20, 21, Ψ. 17, 18, Head, antennae partly removed; 19–21, abdominal segments V–VIII; 22, pygophore. 17, lateral view; 18, 20, 21, ventral view; 19, 22, dorsal view. Scale bar for figs. 17, 18, 22= 0.5 mm; for figs. 19–21= 0.833 mm.

Figures

FIGURE 16. Yangiella montana sp. n. ♂, Habitus. Scale bar = 1 mm.

FIGURES 23 – 30. Yangiella montana sp. n. 23, 24, Pygophore; 25 – 27, left paramere; 28 – 30, phallus and basal structure. 23, 26, 29, ventral view; 24, 27, 30, lateral view; 25, 28, dorsal view. Scale bar for figs. 23, 24 = 0.5 mm; for figs. 25 – 30 = 0.25 mm.