S. syama have a FW cellbar which is club-shaped & a HW sub-basal band broken into 3 spots.
2, other species with these features are S. elwesi & zhengweilei.
In S. zhengweilei the head of the club may be detached & the bands are narrow, with wide spacing of the ground colour.
https://www.ifoundbutterflies.org/sp...is-zhengweilie
It is quite similar to S. elwesi.
Evans described this Un pale yellow with broader bands, the male UpF blue shot ,often with orange markings.
http://yutaka.it-n.jp/lyc4/82865001.html
https://www.ifoundbutterflies.org/sp...indasis-elwesi
Several features suggest this might be S. elwesi.
The HW marginal (or submarginal) line is broken into spots.
THe UpF twin postdiscal bands converge more.
The bands are rather broad.
However it easily may be a form of S. syama without seeing the upperside.
https://www.ifoundbutterflies.org/sp...pindasis-syama
TL Seow: Cheers.