Can anyone help with the ID of this skipper?

Another reason why this is S. minutus is that, as stated in the text, the forewing is unmarked in S. everyx. In the female(S. everyx) small spots may be present in space 2 & in the cell, both which would be hidden at rest.
Your skipper shows 2 hyaline spots in space 6 & 7.

TL Seow:cheers:

I have already happily moved all the photos to my minutus file. What concerns me is the subspecies. As explained, geographically, I would have expected to find ssp. flemingi here, not ssp. aditia.

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Originally Posted by Painted Jezebel

Thank you both. The species were all taken on Koh Samui, which is in the southern peninsular, so we would expect species/subspecies found in S Myanmar to be found here, or at least on the mainland, as we are south of the border, Ranong is a border post between Thailand and S. Myanmar. The vast majority of species/subspecies we have here are of Sundalandian origin, only a few species spreading south from the Indo-Chinese, Indo-Burmese faunal areas.

I must admit that I used EkAmnuay's book for ID, and his photo was not included in the 19 page errata he prepared, so I took it as being correct. I also looked at Pinratana (Volume 5), who pictures ssp. aditia, and it looked nothing like mine.

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You are welcome Les. I also refer to Pinratana's book but more information from Kimura. Mr. Yunosuke Kimura spending more than 30 years collecting with Brother Amnuay Pinratana in Thailand as indicated in the preface and introduction pages.
The following are the collecting details of Suastus minutus aditia documented in his book: (m=male; f-female)

Phu Khiewo: 1f 16 Mar 1976, 1m 11 Jul 1976 and 2m 4 Jul 1988.
Nakohn Nayok: 1m 22 Jul 1973.
Wan Nam Khiewo: 1m 19 Feb 1978.
Phu Pha Thaep: specimens collected by Yamaguichi & Aoki* in 2002.
Kaeng E-Keow: Yamaguichi & Aoki*, 2002.
Phu Chong Na Yoi: Yamaguichi & Aoki*, 2002.
Kao Khiewo: 1m 20 Jun1976.
Kao Chamaoh: 1m 3 Mar 1986.
Than To WF: 2m 20-21 Apr 1986, 1m 17 Jul 1986, 1m 20 Jun 1987, 2m 3-6 May 1987, 2m 1-5 Apr 1991, 2m 14-15 Apr 1991, 1m 4 May 1994, 1m 10 May 1997 and 1m 4 Mar 1998.

Mr. Kimura used the above collecting locations to plot the species distribution map in Thailand. I totally do not know whether any of the above locations near to Koh Samui and need your help to point them out to me.

Teo T P

(*Note: Yamaguichi and Aoki are the co-authors of the book)

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Originally Posted by Painted Jezebel

I have already happily moved all the photos to my minutus file. What concerns me is the subspecies. As explained, geographically, I would have expected to find ssp. flemingi here, not ssp. aditia.

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C&P4 stated that ssp. flemingi is restricted to the interior of the Malay peninsula & from Kedawi (ie Kedah-Langkawi ) northwards, only ssp. aditia occur.

TL Seow:cheers:

Thank you for this information. Of those 9 localities, I only found 5 mentioned on my large detailed map. Two (Nakhon Nayok & Wan Nam Khiewo) are just to N-E of Bangkok, two (Phu Khiewo & Kao Khiewo) are in N-E Thailand, but the last, Than To WF (I would think that means Waterfall) is right on the Thai/Malaysian border, in Yala Province, south-western coast of Thailand. (Kao means small mountain)

This last one is the nearest to me, only 350KM away to the South of me! The others are at least 800KM to the North of me. This must make me question the distribution of the ssp. flemingi. What is it doing in S. Myanmar, skipping Peninsular Thailand only to be found again in Malaysia?

I have come to the conclusion that, with the exception of the deep south around Yala and Narathiwat Provinces, and Ranong Province on the Thai/Burmese border, very little work has ever been done in the Peninsular.

Incidentally, does Kimura mention ssp. flemingi at all in the book?

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Originally Posted by Psyche

C&P4 stated that ssp. flemingi is restricted to the interior of the Malay peninsula & from Kedawi (ie Kedah-Langkawi ) northwards, only ssp. aditia occur.

TL Seow:cheers:

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Thank you. You posted this whilst I was writing the above post. This explains the distribution of flemingi. I will happily change my ssp. on the site and in my draft paper to ssp. aditia.

Thank you both for this wonderful discussion. I have learnt a lot! I do have questions, but they are far too geographically and geologically complicated to deal with here.

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Originally Posted by Painted Jezebel

Incidentally, does Kimura mention ssp. flemingi at all in the book?

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Thanks Les for the information regarding the locations.
No, S. minutus flemingi is not listed as a subspecies in Kimura's book.

Teo T P

Quote:

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Originally Posted by Painted Jezebel

The species were all taken on Koh Samui, which is in the southern peninsular, so we would expect species/subspecies found in S Myanmar to be found here, or at least on the mainland, as we are south of the border, Ranong is a border post between Thailand and S. Myanmar. The vast majority of species/subspecies we have here are of Sundalandian origin, only a few species spreading south from the Indo-Chinese, Indo-Burmese faunal areas.

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The range of a species or subspecies may be small, just a few areas of a country, and within the areas it may occur only at scattered sites. Jame A. Scott (1986) pointed out that butterflies do not survive equally well in all microhabitats and climates. Each species or subspecies has adapted to survive best in places with particular combination of host plants, weather and other necessities (e.g. food resources and roosting sites for larvae and adults, availability of females, activities of other species and insects, predators, parasitoids, pathogens..etc). As no habitats stand still, the amount of rainfall and sunshine affect these factors every minute, hour and day.

However, it is difficult to see a rare species or subspecies maintain themself, especially in the forest. Ecologists and collectors (including photographers) never obtain access to the precise locations where these species or subspecies fly, and such species and subspecies tending to be fairly common in restricted area at particular times of the year.

Teo T P

(Reason for editing: typing error.)