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 Cerambycidae Lamiinae
 Xylorhizini
 Malaysia, Thylactus: angularis
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loongfah
Member Purpuricenus

Singapore
348 Posts

Posted - 22/04/2015 :  16:26:04  Show Profile  Email Poster  Reply with Quote

465.77 KB

Malaysia, Perak
Is this a Thylactus sp?

dryobius
Member Rosenbergia

USA
1702 Posts

Posted - 22/04/2015 :  19:40:27  Show Profile  Email Poster  Reply with Quote
Yes, Thylactus.

Maybe it is T. sumatrensis Hudepohl which I have seen from Sumatra and Borneo. I'll see if I can confirm later.
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dryobius
Member Rosenbergia

USA
1702 Posts

Posted - 23/04/2015 :  00:50:23  Show Profile  Email Poster  Reply with Quote
I don't know the size of the specimen in the photograph, but it looks the same as a specimen of T. sumatrensis that I have from Sumatra.
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loongfah
Member Purpuricenus

Singapore
348 Posts

Posted - 23/04/2015 :  02:36:52  Show Profile  Email Poster  Reply with Quote
Thanks a lot, Dan.

I have no specimen in this case, but my estimate of this species will be about 10 mm.
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dryobius
Member Rosenbergia

USA
1702 Posts

Posted - 23/04/2015 :  05:28:37  Show Profile  Email Poster  Reply with Quote
Wow, that is very short.
T. sumatrensis is 30mm or more. Thylactus spp. are usually 20-35 mm.
I really do believe your specimen is T. sumatrensis and is probably over 25 mm.
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dryobius
Member Rosenbergia

USA
1702 Posts

Posted - 17/05/2016 :  14:40:01  Show Profile  Email Poster  Reply with Quote
The picture above is T. sumatrensis, in my opinion. First, I have a specimen from West Sumatra identified by Hudepohl. I have one specimen from Sabah (here attached). The pubescence on the elytra is a shimmering brown, which changes reflections depending upon the angle of light.

In a paper being prepared, Vives and I are documenting some new records from Borneo. This will likely be included. I do not plan to include the record for Perak. I think it would be important and proper if Loong Fah would publish his records.


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dryobius
Member Rosenbergia

USA
1702 Posts

Posted - 03/04/2019 :  14:23:48  Show Profile  Email Poster  Reply with Quote
I obtained a photo of Loong Fah's specimens, which was taken under different light at a different angle.
It is clearly T. angularis, which occurs over a very large part of SE Asia.
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