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 Cerambycidae Lamiinae
 Lamiini
 Vietnam: Trachystohamus semigranulatus
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BillTyson
Member Rosenbergia

USA
1200 Posts

Posted - 13/05/2016 :  01:05:13  Show Profile  Email Poster  Reply with Quote

51.96 KB

Yen Bai, May, 23 mm



Here are two more views. One shows the crests on the elytra.

Edited by - Xavier on 02/06/2016 07:57:33

Capitaine
Scientific Collaborator

France
1745 Posts

Posted - 13/05/2016 :  10:46:49  Show Profile  Email Poster  Reply with Quote
Lack of contrast, but yes: M. bimaculatus (Gahan,1888)

Claude
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Xavier
Scientific Collaborator

France
11568 Posts

Posted - 13/05/2016 :  17:52:38  Show Profile  Email Poster  Reply with Quote
Same species here ?
There are many pictures of M.bimaculatus on the forum, but with shorter lateral spines on pronotum, and less sharp; base of elytra are less granular. I am not sure that it's the same species.

Edited by - Xavier on 13/05/2016 19:09:33
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BillTyson
Member Rosenbergia

USA
1200 Posts

Posted - 13/05/2016 :  23:22:05  Show Profile  Email Poster  Reply with Quote
It looks different from my short series of bimaculatus. That is why I listed it.
Thanks
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Xaurus
Member Rosenbergia

Germany
1738 Posts

Posted - 14/05/2016 :  01:02:05  Show Profile  Email Poster  Reply with Quote
It is not M. bimaculatus, maybe look at Trachystohamus subelongatus, see type section, but your picture is a bit strange.
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BillTyson
Member Rosenbergia

USA
1200 Posts

Posted - 14/05/2016 :  16:21:11  Show Profile  Email Poster  Reply with Quote
Mine is a lot fresher specimen than Pic type, that's for sure.
This one has a larger elytral spot and I think I see a difference in the length of the 3 and 4th antennal segments between the two.
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Xaurus
Member Rosenbergia

Germany
1738 Posts

Posted - 26/05/2016 :  00:39:18  Show Profile  Email Poster  Reply with Quote

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at my spms from Vietnam the dark spot is variable in size, your spm is very similar, but I'm not quite sure with the ID, there is another similar species Monochamus semigranulatus Pic, 1925 described from Vietnam, maybe Xavier or Gerard can find the type spm in MNHN.
I found a spm from the FREY coll det. by Breuning but it could be wrong
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Xavier
Scientific Collaborator

France
11568 Posts

Posted - 02/06/2016 :  07:56:54  Show Profile  Email Poster  Reply with Quote
This specimen fits Breuning's description of Monochamus semigranulatus (Pic, 1925) in " révision des Agniini" pages 436-437 , but as you said, we have to check holotype specimen.
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BillTyson
Member Rosenbergia

USA
1200 Posts

Posted - 05/06/2016 :  00:38:05  Show Profile  Email Poster  Reply with Quote
Thanks to all.
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MONO
Member Purpuricenus

China
250 Posts

Posted - 09/10/2017 :  17:49:51  Show Profile  Email Poster  Reply with Quote
Xaurus's species is very similar to the holotype of Trachystohamus subelongatus
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Francesco
Forum Admin

Luxembourg
9186 Posts

Posted - 09/07/2022 :  08:30:54  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
Indeed: Trachystohamus semigranulatus (Pic, 1925) after the revision published here.
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