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 Cerambycidae Lamiinae
 Pachystolini
 Cameroon: Gymnostylus signatus
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BGP
Member Nathrius

Spain
19 Posts

Posted - 26/11/2021 :  12:05:43  Show Profile  Email Poster  Reply with Quote


Hello

I'm having troubles with this species.
Is it Prosopocera (alphitophola)? If so... which one? I can't figure it out.

Mbalmayo, Cameroon, Oct 2021, 18 mm

Bennyboymothman
Member Rosenbergia

United Kingdom
1481 Posts

Posted - 26/11/2021 :  15:29:58  Show Profile  Email Poster  Visit Bennyboymothman's Homepage  Send Bennyboymothman a Yahoo! Message  Reply with Quote
Prosopocera murphyi perhaps?
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BGP
Member Nathrius

Spain
19 Posts

Posted - 27/11/2021 :  11:56:27  Show Profile  Email Poster  Reply with Quote
Hello

Thanks for your answer. I have a specimen from Malawi labeled as murphyi. Looks nothing like this. I can't read the original description of murphyi because I don't have free access to the publication, but, apparently, this species occurs in Malawi and this specimen comes from Cameroon. So my best guess it's not that one.

Regards
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Vitali
Member Rosalia

Estonia
936 Posts

Posted - 27/11/2021 :  13:03:19  Show Profile  Email Poster  Reply with Quote
I suspect it belongs to Tragocephalini.
There are species with a similar colour pattern, like, e.g, Tragocephala mixta.

Edited by - Vitali on 27/11/2021 13:07:51
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Bennyboymothman
Member Rosenbergia

United Kingdom
1481 Posts

Posted - 27/11/2021 :  20:35:49  Show Profile  Email Poster  Visit Bennyboymothman's Homepage  Send Bennyboymothman a Yahoo! Message  Reply with Quote
I think Francesco might be on to something, it's certainly an odd beastie
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BGP
Member Nathrius

Spain
19 Posts

Posted - 28/11/2021 :  16:38:46  Show Profile  Email Poster  Reply with Quote
Hello

Tragocephalini wast my first thougth, but I have browsed all the images I could find online for all the Tragocephalini species, and nothing resembled... It's true that many are not represented anywhere, but then I don't know which publication should take a look at or even if I could access to. I would say that it's not Tragocephala. Protonotum matches, especially with the blunt spikes on each side, but then the body looks like too thin and large for me. A Different propotions and shape between this one and the Tragocephala spp in my unexpert opinion. Are the body proportions and sape of the head that leaned me more towards Prosopocerini... Thanks for the help.

Regards

Edited by - BGP on 28/11/2021 16:40:41
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Jérôme Sudre
Member Rosenbergia

France
1707 Posts

Posted - 02/12/2021 :  19:01:01  Show Profile  Email Poster  Reply with Quote
Hello
Look at Gymnostylus signatus . Pachystolini
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BGP
Member Nathrius

Spain
19 Posts

Posted - 14/12/2021 :  19:27:07  Show Profile  Email Poster  Reply with Quote
Hello

Thanks Jérôme. You nailed it. In particular it is the form Gymnostylus signatus m. jadoti Teocchi, 1998.

Regards
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Jérôme Sudre
Member Rosenbergia

France
1707 Posts

Posted - 15/12/2021 :  09:02:36  Show Profile  Email Poster  Reply with Quote
Yes, maybe, but I don't have much interest in the varieties that Pierre had described, I made him notice it, but it was difficult to make him understand that they didn't have any scientific value anymore, in spite of insisting on it, the frequency of the descriptions of varieties decreased with the time.... so he listened a little to what he was told.
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