Ishiharella dentidensa Yu & Yang, sp. nov.

(Figs 1–9, 44–45)

Type material. Holotype: 1 ♂, P. R. China, Mengyang, Yunnan Province, 28 July 2013, coll. Zhihua Fan; 1 ♂, P. R. China, Mt. Leigong, Guizhou Province, 10 July 2011, Zhimin Chang trap (all IEGU).

Length: ♂ 4.14–4.32mm.

Crown orange, with pair of longitudinal pigmented depressions and a yellowish patch. Eyes black; ocelli gray (Fig. 44). Face yellowish, anteclypeus apically black (Fig. 45). Pronotum posteriorly with median triangular black patch (Fig. 44).Scutellum pale orange, scutoscutellar sulcus brownish (Fig. 44). Forewing light brown; hind wing hyaline (Fig. 44). Legs yellowish (Fig. 45).

Male ventral abdominal apodemes reaching posterior margin of segment 3 (Fig. 1). Male pygofer with anterior margin involuted, bearing few setae, ventral margin sinuate, dorsal margin straight; dorsal bridge short (Figs 3, 4). Subgenital plates surpassing pygofer in lateral view, fused in basal 1/3, bearing 10 macrosetae in one row and ca. 42 microsetae in 3–4 rows, width of base nearly equal to width subapically (Fig. 2). Paramere sinuate, subapically broad then narrowing to acute apex, with dorsal process on the swollen subapical part and ventral process near midlength of apophysis (Figs 5, 6). Aedeagus with shaft short, broad, ovoid, strongly laterally compressed, with slender basal apophysis, slightly asymmetrical, branched near apex with branches slightly divergent and with numerous denticuli near apex (Figs 7, 8). Anal tube process sinuate in ventral view, weakly developed (Fig. 9).

Etymology. The new species name is derived from the combination of “denti-”and“densus”, refering to densely denticulate apex of the aedeagal processes.

Remarks. The new species is similar to I. iochoui Dworakowska, 1982 in having a branched aedeagal process (Figs 7, 8) but differs in having many denticuli on the apex of each branch (Figs 7, 8), the paramere with two processes and the apex unbranched and subapically swollen (Figs 5, 6), and the anal tube process sinuate in ventral view (Fig. 9).