Udara with distinct iD feature.

[Psyche]

Two Udara species are similar in sharing a distinctive feature.
They both have two tornal spots in space 1b and none in space 1a.
Most Udara species have three tornal spots.

Both also lack submarginal spots( lunules0 on both wings.

Udara akasa.
Underside white & HW marginal spots w2hite.
Occassionally a small streak may be present in space 1b representing a third spot.
https://www.gbif.org/occurrence/2847201840
https://www.gbif.org/occurrence/2847200894
Example with a small mark at vein 1a.
https://www.gbif.org/occurrence/2847200893
https://www.inaturalist.org/observations/70015975
https://www.inaturalist.org/observations/105431006

the subspecies in Thailand is more distinctly three-spotted at the HW tornus.
https://yutaka.it-n.jp/lyc4/80790010.html

Udara akasa appears to be common in the highlands.


Udara selma.
U. selma is always two-spotted at the tornus & the HW marginal spot are rounder.
UnH strongly darker grey.
https://yutaka.it-n.jp/lyc4/80800010.html
https://upload.wikimedia.org/wikiped...maMUpUnAC1.jpg
https://www.inaturalist.org/observations/270446790

Added.
Udara toxopeusi.
Underside without submarginal spots & two hw tornal spots (as in U. akasa, selma.)
UnF postdiscal spots aligned in an arc.
https://www.gbif.org/occurrence/2847200195
https://www.gbif.org/occurrence/2847200193



Udara camenae.
This is very similar in lacking the submarginal spots/lunules but is three-spotted at the HW tornus.
https://www.gbif.org/occurrence/2847200820
https://www.gbif.org/occurrence/2847201836


Also similar to U. camenae (with 3 tornal spots)..
Udara albocaerulea.
https://nl.wikipedia.org/wiki/Udara#...fiMUpUnAC1.jpg



TL Seow: Cheers.