However the shape of the lower cellspot varies in all species.
There are image of C. aurociliata with two small round cellspots.
Others like C. bromus & cahira may also have a similar large elliptical lower spot with the upper one missing.
C. cormasa is common in Singapore but 99% of shots do not show the upperside.
Here is one by Sunny Chir.
It was tentatively IDed as C. bromus because of the twin cellspots, but the reddish UnH suggest it is probably C. cormasa. CORMASAPHTOBKT.jpg
Still a large lower elliptic cellspot seem the commoner form in C. aurociliata.
A positive ID is a side view showing the yellow cilia on both wings. It is the only species which can do that.
TL Seow: Cheers.
PS. I think you are right. It should be Caltoris aurociliata.
Although not the expected yellow-orange colour the cilia are sharply defined from the wing margins in this species.