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 Cerambycidae Lamiinae
 Lamiini
 Laos: Macrochenus tonkinensis
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Xavier
Scientific Collaborator

France
12017 Posts

Posted - 02/12/2020 :  15:08:01  Show Profile  Email Poster  Reply with Quote

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25 mm. Laos (Houaphan)

Edited by - Xavier on 02/12/2020 18:57:14

Xavier
Scientific Collaborator

France
12017 Posts

Posted - 02/12/2020 :  18:56:55  Show Profile  Email Poster  Reply with Quote
with Breuning revision, I rich Macrochenus assamensis Breuning, 1935.
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Xaurus
Member Rosenbergia

Germany
1896 Posts

Posted - 02/12/2020 :  22:58:10  Show Profile  Email Poster  Reply with Quote
such spms I have ID as Macrochenus tonkinensis Aurivillius, 1920 in my coll., any type picture could be helpful, Psacothea inarmata: http://smithsoniancerambycidae.com/default.asp?Action=Show_Types&Single_Type=True&TypeID=1467 is a synonym, but really ??
Xavier's spm looks like a female (with shorter pronotum and legs ?)
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Xavier
Scientific Collaborator

France
12017 Posts

Posted - 03/12/2020 :  07:01:25  Show Profile  Email Poster  Reply with Quote

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Laos(Luang Prabang). Here a male. Female above is a little dirty, but same white spots an bands, same inferior lobe eyes, etc.

I think that this one is Macrochenus tonkinensis, with different white bands on face, different lobe eyes, etc.

In Breuning revision:
M.tonkinensis & M.assamensis quite similar, but:

inferior lobe eyes longer than cheek -> M.tonkinensis
inferior lobe eyes as long as cheek -> M.assamensis

Edited by - Xavier on 03/12/2020 07:31:15
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Xaurus
Member Rosenbergia

Germany
1896 Posts

Posted - 04/12/2020 :  01:44:31  Show Profile  Email Poster  Reply with Quote
yes, I agree, maybe anybody can provide a type picture of M. assamensis (BMNH) !
features like this mentioned by Breuning are not helpful for identifications
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Francesco
Forum Admin

Luxembourg
9412 Posts

Posted - 04/12/2020 :  22:45:45  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
In my opinion, they are female and male of M. tonkinensis.
M. assamensis is this specimen from Assam, well corresponding to these specimens.

You can read the description of tonkinensis here, p. 13 (373)
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