Symplanella fulva Gong & Chen, sp. nov.

Figs 1–14

Measurements. Body length including forewing: male 6.2 mm (N = 1); forewing length: male 5.2 mm (N = 1).

Diagnosis. Body mainly reddish yellow (Figs 1–2); anal segment with some micro teeth at apical ventral margin (Fig. 9); laterodorsal angles of pygofer with some micro teeth, apex roundly convex (Fig. 9); in lateral view, dorsal margin of aedeagus with a process (Fig. 13).

Description. Coloration. Body mainly reddish yellow (Figs 1–5). Ocelli (Fig. 5) slightly red, semi-translucent; eyes (Figs 3–5) reddish brown. Antennae (Figs 4–5) with one black spot at apex of pedicel. Clypeus (Fig. 4) mostly yellow. Central area of vertex, pronotum and mesonotum pale red (Fig. 3). Forewings (Figs 1–2) subhyaline, veins yellow. Hind wing hyaline, veins slightly yellow. Abdominal sternites yellow with somewhat green. Tergites yellow. Spines of legs with black apices.

Head and thorax. Width of vertex including eyes as wide as pronotum. Vertex (Fig. 3) narrower in middle line than broad at widest part (1:1.8). Frons (Fig. 4) 1.3 times longer in middle line than widest part. Pronotum (Fig. 3) longer in middle line than vertex (1.1:1). Mesonotum (Fig. 3) 1.3 times longer than pronotum and vertex combined. Forewings (Fig. 6) 4 times longer than wide; veins obviously forming a nodal line, ScP + R and MP with common stem; after the nodal line, RP single, MP with three branches, CuA with two branches; Pcu uniting A1 at basal 2/5 of clavus. Hind wing (Fig. 7) 2.1 times as long as broad at widest part, ScP and RP single, MP and CuA with two branches.

Male terminalia. Anal segment (Figs 8, 9) tubular, in lateral view (Fig. 9) broad at basal half, abruptly narrowed at apical half, apex obtuse, with some micro teeth at apical ventral margin, dorsal margin almost straightly, ventral margin slightly waved; 1.8 times longer than wide in dorsal view (Fig. 8). Dorsal margin of pygofer in lateral view (Fig. 9) distinctly shorter than ventral margin, upper third of posterior margin deeply concave, lower fourth roundly convex, laterodorsal angles with some micro teeth at third of posterior margin, apex roundly convex; in posterior view (Fig. 10) nearly oval, with length 1.6 times than widest part; in ventral view (Fig. 12), posterior margin broadly concave in the middle, anterior margin slightly convex. Genital style in lateral view (Fig. 11) with median portion broad, large, with apical margin obtuse convex; dorsal margin uplifted with a process, covered with a lot of micro teeth at apex; in ventral view (Fig. 12) nearly pear-shaped. Aedeagus in lateral view (Fig. 13) with base slightly broad, apical part mostly straight and slender, dorsal margin with a process at middle; phallobase slender, peapodlike.

Type material. Holotype: ♂, China: Yunnan Province, Yingjiang County, Nabang Town (24°70′N, 97°90′E), on bamboo, 18 August 2018, Qiang Luo leg.

Host plant. Bamboo ( Neosinocalamus sp.).

Distribution. China (Yunnan).

Etymology. The specific name is derived from the Latin words “ fulvus ”, referring to the color of the body.

Remarks. This new species is similar to S. brevicephala, but differs in: 1) body mainly reddish yellow (mainly dark brown in S. brevicephala); 2) laterodorsal angles of pygofer with some micro teeth, apex roundly convex (without micro teeth, apex acute in S. brevicephala); 3) dorsal margin of aedeagus in lateral view with a process (without process in S. brevicephala).