Gergithus nonomaculatus Meng & Wang, 2012, sp. nov.

Gergithus nonomaculatus, sp. nov.

(Figs. 1–18, 39, 41)

Description: Male length (N=2) (including tegmina): 5.9–6.3 mm, length of tegmen: 5.4–5.8 mm; female length (N=6) (including tegmina): 6.0–6.9 mm, length of tegmen: 5.6–6.5 mm.

Colouration: Body black. Vertex yellow (Fig. 1, 3). Eyes gray. Frons fuscous with yellow fascia near apex, and black fascia on frontoclypeal suture (Fig. 4). Clypeus fuscous with two yellow small spots on side of base. Rostrum pitchy, apical segment black. Antenna black. Pronotum black, median area fuscous. Mesonotum black with two large yellow lateral spots (Fig. 3). Tegmen dark brown with 9 yellow spots arranged 1, 2, 1, 2, 1, 2 from base to apex of tegmen (Figs. 2, 5). Wing cinereous, veins fuscous (Fig. 6). Legs and abdomen pale brown, apex of fore femora and mid femora dark brown, fore tibiae and mid tibiae black, apices of teeth of hind legs black.

Head and thorax: Vertex broad, nearly rectangular, three times wider than long in middle line, disc distinctly impressed (Figs. 1, 3). Frons convex, almost as long as wide, the widest part about 1.8 times wider than basal part (Fig. 4). Frontoclypeal suture approximately straight. Clypeus relatively broad and flat. Rostrum attaining post-trochanters. Anterior margin of pronotum slightly produced between eyes, with small pit near midline on each side. Mesonotum triangular, 1.7 times wider at widest part than medial length, each yellow spot with pit (Fig. 3). Tegmen oval and reticulate with numerous punctures, 1.6 times longer than wide (Figs. 2, 5). Wing 0.9 times tegmen length (Fig. 6). Spinal formula of hind leg 7–8(9)–2.

Male genitalia: Anal tube large, base narrower than apex in dorsal view, apical margin with 2 obtuse angleshaped prominences on both sides (Fig. 7). Anal column short (about 0.3 times as long as anal tube). Suspensorium wide, S-shaped in lateral view (Fig. 17). Pygofer with strongly convex hind margin (Fig. 18). Connective slender (Fig. 17). Aedeagus U-shaped in lateral view, each side of base with hook-shaped process strongly curved and apex directed ventrally (Figs. 16, 17). Phallobase with dorso-lateral and ventral lobes. Each dorso-lateral lobe of phallobase with bifurcate apical spinous process with long upper branch directed dorsally and shorter lower branch directed apically. Ventral phallobase lobe apical margin slightly arched, shorter than dorsolateral phallobase lobes. Genital style with strongly concave hind margin, caudo-ventral angle widely rounded (Fig. 18). Capitulum of style flat in dorsal view, apex convex, with large lateral tooth apex directed ventrally (Fig. 8).

Female genitalia: Sternum VII with middle of posterior margin clearly convex (Fig. 39). Anal tube nearly ovate in dorsal view, base wider than apex (Fig. 10). Anal column short (about 0.3 times as long as anal tube). Gonoplac slightly prominent in median area, border between first and second gonoplac lobes obsolete, third gonoplac lobes faintly sclerotized and pigmented, fork indistinct in dorsal view (Figs. 9, 15). Proximal part of posterior connective lamina of gonapophyses IX convex in lateral view, distal parts of posterior connective laminae with prominent horn in dorsal view, median field with shallow notch in apical part, lateral fields projecting to form semicircular appendages in dorsal view (Figs. 11, 12). Gonocoxa VIII nearly rectangular, dorsal margin slightly protruding in proximal part. Endogonocoxal process sharply narrowed to apex. Anterior connective lamina of gonapophysis VIII with rod-like appendage at ventral margin of base, and apical group of anterior connective lamina with three teeth, lateral group with three keeled teeth (Figs. 13, 14).

Female reproductive organs: Bursa copulatrix with moderately short and thick ductus at basal half and round pouch at apical half, ductus generally membranous and wrinkled, wall of pouch with weakly visible cells and very small centrally sculptured ornamentation. Junction of vagina and bursa copulatrix with large sclerotized plate. Posterior vagina short and anterior vagina relatively long, apical part of anterior vagina expanded. Oviductus communis opening into antero-ventral wall of anterior vagina, with very thin and short ductus. Spermatheca opened into apical wall of anterior vagina and well-developed, ductus receptaculi robust with compact helix-shaped feature at proximal half and comparatively slender with sparse helix-shaped feature at distal half, diverticulum receptaculi apparently dilated or subglobular, spermathecal pump slim and wall with spiral loop (Fig. 41).

Material examined: Holotype: male, Bawangling Mountain, Changjiang County, Hainan Province, China, 750m, 5–7 June 2008, coll. Yibing Ba, Juntong Lang. Paratypes: 2 females, same data as holotype; 1 male, 2 females, same locality, 8–11 November 2006, coll. Jiliang Wang, Chao Gao; 2 females, Bawangling Mountain, Hainan Province, China, 433m, 30 July 2010, coll. Chaozhong Jiang.

Remarks: This new species resembles G. multipunctatus Che, Zhang and Wang, 2007; but differs from the latter by the colouration of the tegmen and frons, the latter with ten yellow spots arranged 1, 2, 1, 2, 1, 2, 1 from base to apex of tegmen and frons with one yellow spot near apical margin. The structure of the aedeagus of the two species is very different.

Etymology: The specific name “ nonomaculatus ’’ refers to the nine yellow spots on the tegmen.