Skipper ID request

[LJK1410]

Hi Dr Seow,

Require confirmation on some IDs. Thank you!

1. Potanthus serina?
photo1665919627.jpeg

2. Caltoris sp. Shot on Pulau Ubin by Lumin Ong
WhatsApp Image 2022-10-15 at 2.40.53 PM.jpeg

3. Amathusia phidippus? Shot on Pulau Ubin by Lumin Ong
WhatsApp Image 2022-10-16 at 7.31.19 PM.jpeg

[Psyche]

Post 41.

1. Potanthus serina male.
Note FW spot 5 is smaller than sot 4.
HW shaded dark brown, not black; HW band with a triangular spot 6 on the upper inner corner.

2. Caltoris cormasa male.
Note prominent pale area on antenna, the dark reddish colour deeper on HW; FW spots yellowish.


3. Male Amathusia phidippus phidippus
Note HW 4th dark band from base , both margins not notched by the passing veins.
Amathusia.png

Examples.
Tanglin
https://inaturalist-open-data.s3.ama...617/large.jpeg
Nanyang.
https://inaturalist-open-data.s3.ama...1922/large.jpg
CWCA
https://static.inaturalist.org/photo...1250/large.jpg
https://inaturalist-open-data.s3.ama...177/large.jpeg
Southern Ridges.
https://static.inaturalist.org/photo...237/large.jpeg
Cluny.
https://inaturalist-open-data.s3.ama...350/large.jpeg
Pasir Ris.
https://static.inaturalist.org/photo...953/large.jpeg


Amathusia friderici holmunhunti
This is not uncommon as the larva now feed on oil palm. A dark form in which the male upperside is almost black (form utana) also exist.
This differs from A. phidippus in that the 4th dark band from the HW base is strongly notched by the veins on both margins.
As expected most sightings are on Pulau Ubin.
P. Ubin.
https://inaturalist-open-data.s3.ama...7804/large.jpg
https://static.inaturalist.org/photo...1194/large.jpg
https://static.inaturalist.org/photo...724/large.jpeg
https://static.inaturalist.org/photo...114/large.jpeg
https://inaturalist-open-data.s3.ama...4447/large.jpg
Botanic Garden.
https://inaturalist-open-data.s3.ama...058/large.jpeg
Pasir Ris.
https://inaturalist-open-data.s3.ama...653/large.jpeg


TL Seow: Cheers.

[LJK1410]

Thank you Dr Seow!

After reading the key ID features you mentioned, I re-looked at my previous Amathusia shots. I labelled this as A. phidippus previously but now I noticed the 4th band seems to be notched by the veins. Perhaps you could take a look.

Shot at Upper Seletar Reservoir
photo1665927345.jpeg
photo1665927345 (1).jpeg

[Psyche]

Post 43.

These are both A. phidippus.
If you look at the inner margin of the 4th band there are practically no indentation made by the veins.


TL Seow: Cheers.

[LJK1410]

Ah okay I get it now, thank you very much Dr Seow!

[LJK1410]

Hi Dr Seow,

Some IDs that need confirmation. Thank you!

1. Potanthus trachala?
trachala.jpeg

2. Caltoris cormasa
cormasa.jpeg

3. Ypthima horsfieldii? All are the same individual, not sure if the uppersides would add any clarity but included anyways.
ypthima 1.jpeg
ypthima 2.jpeg
ypthima 3.jpeg

[Psyche]

Post 46.

1. Male Potanthus trachala.
Although FW spot4 have some degree of overlap with spot 3 this is variable. On the upperside the spots 4 & 5 are fully detached.

A continental species P. pseudomaesa is very similar.
but the FW spots in space 1b, 2 & 3 are wider.
A useful guide is that the subapical spots in P. trachala are notched & spiky.

P. trachala FW 14-15mm. male & female.
http://4.bp.blogspot.com/-kvlAhJLLsd...la-tytleri.jpg
http://www.butterflycircle.com/check..._female_01.jpg

P. pseudomaesa FW 13mm..Capable of finding its way into Singapore.
Male H.K.
https://images5.fotop.net/albums/but...seudomaesa.jpg
India male.
https://encrypted-tbn0.gstatic.com/i...bibpg&usqp=CAU
Female.
https://www.ifoundbutterflies.org/si...495_236702.jpg
https://www.ifoundbutterflies.org/si...495_236703.jpg



2. Probably female Caltoris bromus.
FW & HW are nearly of similar tone.
FW subapical spots two, Visible upper cellspot large.
Male.
https://inaturalist-open-data.s3.ama...7817/large.jpg
The female is paler but not always this pale.
The HW white spots are not always present.
https://inaturalist-open-data.s3.ama...387/large.jpeg

Typical female Caltoris cormasa.
FW subapical spots more often three; FW upper cellspot typically small; HW deeper darkish red tone.
http://2.bp.blogspot.com/-2caxXSexYr...0/DSC_0108.JPG
http://4.bp.blogspot.com/-ET0KyvY9PP...0/DSC_0341.JPG
http://www.butterflycircle.com/check...obby%20Mun.jpg
https://live.staticflickr.com/5258/5...67d64c22_b.jpg
https://inaturalist-open-data.s3.ama...3340/large.jpg
https://inaturalist-open-data.s3.ama...2776/large.jpg
https://inaturalist-open-data.s3.ama...958/large.jpeg



3. Ypthima horsfieldii.

Probably 95% of Y baldus have HW spot 5 larger than spot 6.
Perhaps another 5 % have them equal.
Underside more buff coloured.
http://1.bp.blogspot.com/-DN5O-c2TqL...Anthony_01.jpg
https://2.bp.blogspot.com/-H6ohrwJ_P...R_adult_01.jpg
http://www.butterflycircle.com/check...pair_Bobby.jpg



TL Seow: Cheers.

[LJK1410]

Thank you Dr Seow!

[LJK1410]

Dr Seow,

Regarding Post 46, I took another look at the Caltoris and there is actually 3 FW spots, but because of the file size limit I had to lower the resolution and the third spot wasn't clear. Here is the iNaturalist link for a clearer image: https://www.inaturalist.org/observations/139620987

[Psyche]

Dr Seow,

Regarding Post 46, I took another look at the Caltoris and there is actually 3 FW spots, but because of the file size limit I had to lower the resolution and the third spot wasn't clear. Here is the iNaturalist link for a clearer image: https://www.inaturalist.org/observations/139620987

The 3rd subapical spot (spot 8) is rather vague & ill-formed.

Both C. bromus & cormasa (females especially) can have 2 or 3 fully formed subapical spots or sometimes even one only.
It is just that female C. bromus tend to have two subapical spots, & cormasa three.

The other factor is the upper cellspot tend to be large in bromus.
Also your specimen is very fresh, yet it does not show the distinctive dark mottling on the HW of cormasa.
Is it a coincidence that the upper cellspot is large.


Here is another shot of yours, which is fresh & can be identified immediately as a female Caltoris cormasa.
https://www.inaturalist.org/observations/120486424
https://inaturalist-open-data.s3.ama...2743/large.jpg


TL Seow: Cheers.