Nacaduba kurava or calauria

[DaveChiangMai]

I've been looking at this image in my collection a great many times and am still not convinced I can say with any confidence if this is Nacaduba kurava or calauria (the latter I am not familiar with)

From previous postings on ButterflyCircle calauria should have well developed dark stria and a straight forewing outer-discal band. However images on BC checklist show the band being either straight or curved/broken.

This image was photographed in southern Thailand on Malaysia border. Low elevation primary forest.

I note the very dark colouration (much darker than all my kurava images).
The seemingly crowded and chaotic layout of the stria on both wings looks very odd against all my other Nacaduba images.
I also note the pointed nature of the sub-marginal forewing spots 4 and 5.

Any comments on the ID of this one would be very helpful please.
Many thanks.

b4775 Transparent Sixline Blue (Nacaduba kurava nemana) 115 m - Bang Lang 02.JPG

[Psyche]

This is a typical female N. kurava .
It has large submarginal spots with rounded inner margins.

N. kurava dark striae in postdiscal band weak in the male, less so in the female.
Submarginal spots with rounded margins; HW spot 6 often very large.
Males.
https://www.butterflycircle.com/chec...ue-SunnyC2.JPG
https://www.butterflycircle.com/chec...neBlue-KSK.JPG
Females.
https://www.ifoundbutterflies.org/me...Saji_ae302.jpg
https://www.flickr.com/photos/115784433@N04/38693424025
https://singapore.biodiversity.onlin...doptera-000142

N. calauria ;Dark striae prominent in both sexes.
FW submarginal spots relatively small with spots 4 & 5 sharp-pointed.
FW postdiscal band almost always straight& unbroken.
Male.
https://wanderingbutterflyeffect.fil...b3ad98860e.jpg
Male left; female right.
https://www.butterflycircle.com/chec...llen%20Tan.JPG
Female with larger submarginal spots.
https://www.butterflycircle.com/chec...yica---2--.jpg

There were lots of errors in the past.

TL Seow: Cheers.

[DaveChiangMai]

Many thanks for the details.