Hyphaenia costata (Medvedev, 2001), comb. nov.

Platyxantha costata Medvedev, 2001: 185 (original description)

Type material examined. HOLOTYPE (photograph): ♂, ‘ Vietnam: Buon Loi / 40 km N Ankhe / 600m [p] 8.VI. [h] 198 [p] 0 [h] / L. MEDVEDEV et al. [w, p] // HOLOTYPUS [p] / Platyxantha / costata m. [h] / L. Medvedev det. 19 [p] 98 [r, h]’ (LMRM).

Comments. I examined only photographs of the holotype of Platyxantha costata . Based on the structure of the aedeagus with a bifurcate apex I tentatively transfer it to Hyphaenia, as was speculated by MEDVEDEV (2001) himself, however, further study is necessary to confirm this placement.