ID confirmation - Tanaecia sp

[DaveChiangMai]

I photographed this in Hala-Bala WS, on the Malaysian border in extreme southern Thailand, June 2023. The common Tanaecia species in s Thailand is T. pelea, but this looks different to all my images of T. pelea from Thailand, in subtle ways. I am worndering if this is T. palguna. I read that there are some differences in the shape and positioning in the submarginal arrowheads, but having no expeience of palguna I find this hard to judge. Comments on the ID welcome please.

28319

[Psyche]

This would be correct for a male Tanaecia palguna.

The three Tanaecia species can be tricky because of close similarity.
They can also be very different from region to region.


Tanaecia pelea male. Labial palps long needle like.
HW rounded . arrowheads nearer the inner border of the paler marginal zone.
Body built more slender.
https://inaturalist-open-data.s3.amazonaws.com/photos/232314132/large.jpg
https://static.inaturalist.org/photos/234891325/large.jpg

Tanaecia palguna male.
Labial palps much shorter.
Stout built. HW more tapered.
HW arrowheads nearer the outer margin.
fW arrowheads relatively short ,penetrating less into the pale 'helmet' spots.
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiWoHsTzdxVR27sCdfpod20iWCEA1DU6zKtVRwTKGxHdA fedXCl0Yp0n3a0ioTI1IIH8kGHt7F52Uon9rCLy3fDHYnVq5TK kxzdgjaVwIHZeBXS-faPOfS8PusAKgCf-LNAGvTh9rmB0duYNXw5pztHcS4n_zqaXODJf2DuEFEWDP0f4UM cL2_Jjy3I/s1024/tn1.jpeg
https://inaturalist-open-data.s3.amazonaws.com/photos/106986917/large.jpg

Tanaecia munda male.
Stout built & HW more tapered. Palpi short.
HW arrowheads set nearer the outer margin (as in palguna.)
HW with more white shading.
FW arrowheads longer ,the tip penetrating deeper into the white 'helmet' spots.
https://thaibutterflies.com/wp-content/uploads/2016/07/Tanaecia-munda-1.jpg



TL Seow: Cheers.

[DaveChiangMai]

Many thanks for the confirmation and details.