Hyphaenia costata ( Medvedev, 2001 ) Bezděk, 2019

Bezděk, Jan, 2019, Taumacera revisited, with new synonyms, new combinations and a revised catalogue of the species (Coleoptera: Chrysomelidae: Galerucinae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 59 (1), pp. 23-52 : 48

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.