Eupanacra regularis
Forewing upperside with postmedial lines similar to Eupanacra automedon, but curving costad anteriorly, distal postmedial line reaching costa; white subapical angular markings distinct, arranged almost linearly (unlike Eupanacra automedon) so the W-shape is barely discernible. Forewing underside distal marginal border ill-defined, dilated between M1 and M3 where it reaches the postmedial lines; brown area much more extensive than in Eupanacra automedon.
Male genitalia: Uncus longer than in Eupanacra automedon and Eupanacra malayana, only half the width, apex incised. Gnathos more tapered than in Eupanacra malayana. Valve with 8-10 stridulatory scales in three rows. Harpe shorter than in Eupanacra automedon and Eupanacra malayana, broader, and more distinctly spatulate. Phallus apical process with left lobe narrow, short, dentate; right lobe curved distad and laterad, more projecting than in other species, narrow, with a few heavy apical teeth.