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/wikipedia/commons/0/01/UdaraSelmaSelmaMUpUnAC1.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#/media/Bestand:UdaraAlbocaeruleaScharffiMUpUnAC1.jpg



TL Seow: Cheers.

[Psyche]

These two species share a common feature.
UnH have a dark spot at the base of space 7.
28813

Acytolepis puspa.
FW with a spot 9 at the costa (occasionally absent)
Underside markings heavily contrasted. & white-ringed.
https://www.gbif.org/occurrence/2847199166
https://www.gbif.org/occurrence/2847199174
https://www.gbif.org/occurrence/2847199173


Oreolyce archena.
UnF without a spot 9. Ground whitish. White rings weak.
https://www.gbif.org/occurrence/2847202249
https://www.gbif.org/occurrence/2847202288
https://www.gbif.org/occurrence/2847202251

[Psyche]

These two are very similar and seem to have been much confused.

Celastrina lavendularis.
the key separate Celestrina based on the darker ground and prominent white rings around the spots.
However, in P. Malaysia there is only C. levandularis to contend with.
Underside ground darkish grey with prominent white rings around the spots.
UnH spot 7 and sub-basal spots very dark.
UnH submarginal lunulate line often rather pointy.
HW marginal spots often heavy.
Forms with smaller spots also occur.
https://yutaka.it-n.jp/lyc4/80870020.html
https://wingscales.com/Lycaenidae/Celastrina-lavendularis-isabella
https://www.gbif.org/occurrence/2847200101
https://www.gbif.org/occurrence/2847199548
https://www.gbif.org/occurrence/2847199548
https://www.gbif.org/occurrence/4177487516
https://www.inaturalist.org/observations/181049771


Udara placidula.
Udara species care marked as in Celestrina.
U. placidula is greyer than U. dilecta and have HW spot 7 blacker and darker than the other postdiscal spots.
The general appearance is like C. lavendularis.
However the white rings are only weakly developed.
UpF male with a very narrow border.
HW submarginal lunules more rounded.
https://yutaka.it-n.jp/lyc4/80770010.html
https://thaibutterflies.com/Butterflies/udara-placidula/
https://commons.wikimedia.org/wiki/File:UdaraPlacidulaPlacidulaFUpUnAC1.jpg
https://upload.wikimedia.org/wikipedia/commons/thumb/7/73/UdaraPlacidulaPlacidulaMFUpUnAC1.jpg/1200px-UdaraPlacidulaPlacidulaMFUpUnAC1.jpg
https://www.inaturalist.org/observations/214331294

The two museum specimens have some problem.
1. This lack submarginal spots and look to be U. camenae.
https://www.gbif.org/occurrence/2847201798
2. The male upperside looks correct, but the UnH spot 7 is pale.
https://www.gbif.org/occurrence/2847201795

Added. found valid specimens.
https://www.gbif.org/occurrence/2847202355
https://www.gbif.org/occurrence/2847201800
https://www.gbif.org/occurrence/2847201794

[Psyche]

These two species are similarly marked with small spots.

Udara dilecta.
Wings with submarginal spots/lunules.
Postdiscal spots more or less evenly dark.
Ground whitish.
https://yutaka.it-n.jp/lyc4/80760001.html
https://wingscales.com/Lycaenidae/Udara-dilecta-dilecta
https://www.gbif.org/occurrence/2847200139
https://www.gbif.org/occurrence/2847201825


Udara rona.
Uperside deeper blue in both sexes.
Underside postdiscal spots paler ,mostly light yellowish brown often faded.
https://www.gbif.org/occurrence/2847201863
https://www.gbif.org/occurrence/2847201850
https://www.gbif.org/occurrence/2847201828
https://nlliew66butterflies.blogspot.com/2015/06/udara-rona-catius-fruhstorfer.html

[Psyche]

These two are also similar in markings.

Udara cyma.
Wings with submarginal spots which are often thick.
HW spot 7 large and dark.
postdiscal spots arranged in a regular curve, almost aligned.
HW tornus with 3 spots. 2 in space 1b, & 1 in space 1a.
Ground darker.
https://www.gbif.org/occurrence/2847200156
https://www.gbif.org/occurrence/2847200158


Callenya lenya.
Wings with submarginal spots.
HW spot 7 large and black.
Postdiscal spots not aligned.
HW with 2 tornal spots in space 1b which may unite; no spot in space 1a.
Ground white.
https://www.gbif.org/occurrence/2847200102
https://www.gbif.org/occurrence/2847200112
https://www.gbif.org/occurrence/2847200120


Added. Similar to the above.
Plautella cossaea.
Spots are large and rounded.
Submarginal spots largely separated.
HW postdiscal spots closer to the submarginals.
Ground darkish.
https://www.gbif.org/occurrence/2847200222
https://www.gbif.org/occurrence/2847200189
https://www.gbif.org/occurrence/2847200224
https://www.gbif.org/occurrence/4145705754

[Psyche]

Udara coalites.
Submarginal spots obsolete in the FW apex and mostly on the HW.
FW postdiscal spots large, nearly aligned.
https://www.gbif.org/occurrence/2847200253
https://www.gbif.org/occurrence/2847200246



Mondontides musina.
HW with spot 7 large & dark, ground dusky.
Resembles Udara placidula, but sub-basal spot in space 1b diagnostic.
28814
https://en.wikipedia.org/wiki/Monodontides_musina#/media/File:MonodontidesMusinaMusinaFUpUnAC1.jpg
https://www.ifoundbutterflies.org/sites/default/files/95_3877-934-54defba65b3db-1.jpg


TL Seow: Cheers.