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 fossil and subfossil Coleoptera
 Cerambycid? Burmese Amber
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Francesco
Forum Admin

Luxembourg
7698 Posts

Posted - 20/01/2017 :  18:41:52  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote

286.83 KB

~7 mm
Amber from Myanmar (98-99 Myr BP).
A new species
What do you think about?


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Xavier
Scientific Collaborator

France
7929 Posts

Posted - 20/01/2017 :  18:54:09  Show Profile  Email Poster  Reply with Quote
Not easy
Something close to Dinoptera ? Eyes are very big as in Chrysomelidae.

Edited by - Xavier on 20/01/2017 18:57:28
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Francesco
Forum Admin

Luxembourg
7698 Posts

Posted - 20/01/2017 :  20:03:41  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
My doubt is between Dorcasominae and Chrysomelidae.
I do not think Lepturinae due to the short forehead.
The second ones normally show more globular antennal articles.
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Andre
Member Rosenbergia

Germany
1020 Posts

Posted - 20/01/2017 :  21:08:40  Show Profile  Email Poster  Reply with Quote
Might be near by Lema / Chrysomelidae
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Francesco
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Luxembourg
7698 Posts

Posted - 20/01/2017 :  22:12:30  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
I observed that Chrysomelidae show closer antenna supports.
Here, the forehead is very large.


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Xavier
Scientific Collaborator

France
7929 Posts

Posted - 21/01/2017 :  09:35:06  Show Profile  Email Poster  Reply with Quote

133.47 KB

I do not show pronotum.
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Francesco
Forum Admin

Luxembourg
7698 Posts

Posted - 21/01/2017 :  11:16:09  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
Thanks!
I add the picture of the posterior leg (with the only visible tarsus).


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Xavier
Scientific Collaborator

France
7929 Posts

Posted - 21/01/2017 :  11:48:11  Show Profile  Email Poster  Reply with Quote

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J'ai du mal à segmenter les tarses, c'est trop flou.
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Xavier
Scientific Collaborator

France
7929 Posts

Posted - 21/01/2017 :  12:10:37  Show Profile  Email Poster  Reply with Quote
...par ailleurs, la ponctuation des élytres fait penser à celle de certaines Donacia ou Plateumaris.
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Francesco
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Luxembourg
7698 Posts

Posted - 22/01/2017 :  12:52:38  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
Je les vois bien, mais il est difficile de faire de photos nettes.
J'ai encore modifié l'ambre et essayé encore:




La forme du tarsomere II me rappelle les Dorcasominae.
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Xavier
Scientific Collaborator

France
7929 Posts

Posted - 22/01/2017 :  13:24:32  Show Profile  Email Poster  Reply with Quote
Ok, déjà ça confirme ce que je voyais.
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Francesco
Forum Admin

Luxembourg
7698 Posts

Posted - 22/01/2017 :  20:06:13  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
Je commence à penser qu'il est un Pyrochroide....
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Xavier
Scientific Collaborator

France
7929 Posts

Posted - 22/01/2017 :  21:07:14  Show Profile  Email Poster  Reply with Quote
avec ces antennes là ?
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Francesco
Forum Admin

Luxembourg
7698 Posts

Posted - 22/01/2017 :  21:14:13  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
Regarde ceux-ci, l’avant-corps est identique.
Maintenant il y a d'autres familles (Pilipalpinae ou Pedilidae par exemple) qui font partie des Pyrochroides... il ne faut pas regarder trop à ça.
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Xavier
Scientific Collaborator

France
7929 Posts

Posted - 23/01/2017 :  09:05:35  Show Profile  Email Poster  Reply with Quote
Bon, le problème, c'est qu'on trouve des espèces ressemblantes dans différentes familles; il faudrait avoir le spécimen en main pour pousser l'examen...
Je me demande si la structure très grossièrement ponctuée des élytres pourrait nous aider.

Edited by - Xavier on 23/01/2017 09:31:38
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Francesco
Forum Admin

Luxembourg
7698 Posts

Posted - 26/01/2017 :  10:28:16  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote



After remodelling of the amber, lateral and front view.
I have also added a new picture at the beginning of this topic.
There... I begin recognising a Chysomelid...
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