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Pierre
Member Rosenbergia
Switzerland
1755 Posts |
 Posted - 09/01/2011 : 21:01:46
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Dear Francesco,
Here I come back on your forum with a few new posts for the new year.
First: a small 15mm Cerambycid female from Cameroon, it remembers some Callidiini (??).
Perhaps you have some inspiration. |
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Francesco
Forum Admin
Luxembourg
9454 Posts |
Posted - 04/02/2011 : 19:03:30
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By considering its distribution, it should be a representative of the tribe Xystrocerini, such as Leptoeme. Not easy to identify without a closer examination.
Could you please add a picture of the ventral side? |
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Pierre
Member Rosenbergia
Switzerland
1755 Posts |
Posted - 04/02/2011 : 21:23:54
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Xystrocerini?? That would be a real surprise... here the ventral view. |
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Francesco
Forum Admin
Luxembourg
9454 Posts |
Posted - 06/02/2011 : 10:58:35
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The long acute (1), posteriorly open (2) procoxal cavities and the large intercoxal process indicate a primitive representative of Cerambycinae.
Other characters (ligula corneous or membranous, which differentiate Hesperophanini from Xystrocerini) are not visible; however, no Hesperophanini has dentate antennae.
Eyes look finely faceted (this implies Callidiini), but I noticed that some Xystrocerini have this character as well.
I am compilation a key to African Xystrocerini... I hope to identify your specimen (a female). |
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Pierre
Member Rosenbergia
Switzerland
1755 Posts |
Posted - 06/02/2011 : 11:22:24
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| I am really curious about your following observations and comments. I would never have thought that this species belongs to the Xystrocerini tribe. What's about the scape? Do not Xystrocerini have spines onthe first antennomere? - Concerning the eyes, yes, the facets are fine and flattened. |
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Francesco
Forum Admin
Luxembourg
9454 Posts |
Posted - 06/02/2011 : 12:18:45
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Xystrocera and Xystroceroides are the only genera of Xystrocerini having such character.
Past authors did not consider it as sufficient to identify a tribe since e.g. Callichromatini, Compsocerini, Batocerini have species or even genera with more or less developed or even absent apical spine.
Actually, Xystrocerini have genera with apical cicatrix like Lamiini (e.g. Oxycauloeme, Parauxesis, Diptychoeme) or not, dentate antennae (e.g. Paroeme, Antennoeme) or not, shorted elytra (Methia and similar) or not, divided eyes (Tetraomatus, Diptychoeme) or not, divided stridulatory area (Oplatocera) or not, finely faceted eyes or not, etc. but all are characterised by corneous ligula and acute open procoxal cavities.
More recently, Martins proposed to divide Xystrocerini, Methiini and Oemini.
Xystrocerini for the antennal spine, Methiini for the shortened elytra, Oemini the rest.
He also added larval characters, but only concerning Xystrocera, Methia and Oeme... moreover, evidencing characters (number of ommatides) banally variable in some other tribes, such as Clytini.
However, he ascribed a lot of genera with shortened elytra to Oemini (Kalore, Necydalosaurus, Methioides, Methioeme) and with normal ones to Methiini (Methicula)...
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Pierre-Olivier Maquart
Member Rosalia
United Kingdom
784 Posts |
Posted - 27/02/2015 : 10:00:55
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Little up  |
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Francesco
Forum Admin
Luxembourg
9454 Posts |
Posted - 27/02/2015 : 18:35:37
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Another idea is that this species is a member of Smodicini.
In the library, we have the revision by Martins... actually, the differences between these primitive tribe are fairly confuse. |
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Francesco
Forum Admin
Luxembourg
9454 Posts |
Posted - 13/04/2015 : 20:54:29
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En effet, ils n'existent pas de Xystrocerini avec cet aspect.
Je regarderai au côté de Smodicini.
Le genre plus proche semble être Smodicum... nouveau?
Pourtant, il faut dire que Holorusius (qui manque dans le révision) lui ressemble beaucoup... |
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Jérôme Sudre
Member Rosenbergia
France
1773 Posts |
Posted - 19/06/2015 : 11:40:30
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| En effet cette bestiole rappelle beaucoup Holorusius perrieri Fairmaire = Zamium laevicolle et il s'agit probablement d'elle ? |
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Francesco
Forum Admin
Luxembourg
9454 Posts |
Posted - 22/06/2015 : 10:40:54
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Oui, ça semble la chose plus probable, je ne sais pas pourquoi je ne l'ai pas reconnu tout de suite.
Il m'avait donné l'impression d'un insecte très petit, mais maintenant je lis qu'il atteint 15 mm  |
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Pierre
Member Rosenbergia
Switzerland
1755 Posts |
Posted - 22/06/2015 : 13:51:53
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Merci à tous.
C'est vraiment plaisant de voir tout ce que ce genre de "travail commun" arrive à sortir... |
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Jérôme Sudre
Member Rosenbergia
France
1773 Posts |
Posted - 22/06/2015 : 16:12:20
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| Francesco a raison la bête m'a aussi donné l'impression d'être petite, et la surexposition lumineuse m'a aussi induit en erreur à moins qu'elle soit immature ? |
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Cameroon: Holorusius perrieri
