Prodasineura coerulescens (Fraser, 1932)

Figs 2 A–B, 3 A–B, E, 4 A–C, 5 D–E, 16 C, 17

Material examined

VIETNAM – Dong Nai Province • 3 ♂♂, 3 ♀♀; Dinh Quan District, Mai waterfall; 8 Oct. 2016; Q.T. Phan leg.; ZCDTU 2016100801-ODO . – Quang Binh Province • 2 ♂♂; Minh Hoa District, Tan Hoa Commune; 18 Nov. 2019; Q.T. Phan & Q.P. Ngo leg.; ZCDTU 2019111801-ODO .

Diagnosis

Male black with bluish stripes on head, thorax, abdomen and anal appendages (Figs 2A, 3 A–B). S8 with two small distinct spots (in Dong Nai specimens, Fig. 3A) or entire dorsal stripe which extends posteriorly (in Quang Binh specimens); blue marking covering most of S9, gradually narrowing at base thus forming blue triangular-shaped spot; dorsal S10 blue, lateral-ventral black (Fig. 3A). Cerci dorsally entirely blue; paraproct blue, black apically (Fig. 3 A–B). Female similar to male in shape, body colouration; pale elements are yellowish (Fig. 2B). Posterior pronotal lobe of prothorax with separate ear-like process on each side (Figs 4B, 5 D–E).

Distribution

Vietnam (Fig. 17): Quang Binh (Minh Hoa District) and Dong Nai (Dinh Quan District and Cat Tien National Park) Provinces (Do & Dang 2007; Kompier 2019; this study).