Arhopala norda?

[Psyche]

This is one of those enigma in Singapore that have never been solved.

In the past there were examples with various trace of tornal white cilia.
eg.
https://www.butterflycircle.com/chec...20Tan%20CP.jpg
https://www.butterflycircle.com/chec...-2---Tan-C.jpg
https://blogger.googleusercontent.co...lt_Khew_01.jpg
https://blogger.googleusercontent.co...onathan_01.jpg
https://blogger.googleusercontent.co...en_wing_01.gif
They were also examples in which the tornal white spot is quite distinct eg.
https://blogger.googleusercontent.co..._female_01.jpg
https://blogger.googleusercontent.co..._female_01.jpg

Also present are examples without the white tornal spot.
https://www.flickr.com/photos/budak/52368565445
https://wanderingbutterflyeffect.wor...1c48c6860d.jpg

The only way to find out if there are two species is to catch a male with a defined white spot.
Squeezing the abdomen will cause the valvae (claspers) to open out.
A smartphone picture of the inside of one of the valva, zoomed for comparison.
https://yutaka.it-n.jp/lyc4f/81900001.html
https://yutaka.it-n.jp/lyc4f/81920010.html



TL Seow: Cheers.

[horace2264]

This is one of those enigma in Singapore that have never been solved.
'
'
'

The only way to find out if there are two species is to catch a male with a defined white spot.
Squeezing the abdom,en will cause the valves to open out.
A smartphone picture of the inside of one of the valve, zoomed for comparison.
https://yutaka.it-n.jp/lyc4f/81900001.html
https://yutaka.it-n.jp/lyc4f/81920010.html

TL Seow: Cheers.

Many thanks, Dr Seow for the detailed explanation.
From CP4, the difference in the male valva is about being unilobate (A. norda) or bilobate (A. major). The links at yutaka.it-n.jp show the difference clearly.
Definitely more work is needed in order to solve this SG mystery.