Forum Entomologi Italiani

For adding to the very nice photos of Dicerca posted today:


16 mm

Regards,

Stéphane

Su quale pianta è stata raccolta? Abies cephalonica?

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Daniele

Yes, on dead woods near the road... But I am not sure about the species. There were Abies and Fagus...

Stéphane

I don't think that there is other Abies, at least not natural

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Cosmin-Ovidiu Manci
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cosmln's place - my blog
just insects
Dragonflies of Romania

even being not a buprestid specialist i try and say Dicerca (Argante) herbsti Kiesenwetter, 1857

secondary parasite of Abies cephalonica

p.s. according to some greek naturalistic guides i have seen, pure Abies cephalonica still exists only in cephalonia island; elsewhere, repeated introductions of other Abies species resulted in extensive hybridisations and disappearance of pure populations

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maurizio

Confermo tutto.

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Maurizio Gigli
http://utenti.romascuola.net/bups
http://bup.xoom.it/

i'm not familiar with Abies nordmanniana (this one from what I know is similar and maybe introduced there), but where I have seen Abies in Peloponnese for sure was not Abies alba

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Cosmin-Ovidiu Manci
**********************
cosmln's place - my blog
just insects
Dragonflies of Romania

It's not so important for our xylophagous beetles. Usually Buprestids are specific of a whole genus or few related genera of plants. So, for a Dicerca herbsti any species of Abies is good.

Non è così importante per gli xilofagi. Di solito i Buprestidi sono specifici di un intero genere di piante o di più generi vicini. Quindi per una Dicerca herbsti va bene qualsiasi specie di Abies.

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Maurizio Gigli
http://utenti.romascuola.net/bups
http://bup.xoom.it/

bonjour stéphane

s'agissait-t-il de troncs abattus et amassés le long de la route... ou bien d'arbres morts, sans plus d'écorce et encore sur place ?

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maurizio

De troncs abattus et entreposés au bord de la route

le troncs morts et encore debout, sans plus d'écorce, tués par des attaques de xylophages et donc parsemés de trous, conviennent fort bien à pas mal de chrysides ...

i tronchi morti in piedi, senza più corteccia, uccisi da attacchi di xilofagi e quindi disseminati di buchi, sono un bellissimo ambiente per molti crisidi ...

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maurizio

Usually, the xylophagous buprestids can be found on cut trunks, if more trunks of the same tree species it is better. But the trunks MUST be under the direct sun exposition. It can be interesting to notice the time interval for every species.
For example, one observation on a pile of trunks of Picea abies:
Chrysobothris chrysostigma - between 11-15 (about 15 specimens)
Anthaxia quadripunctata - between 11-14 (lot of specimens, over 30 - I didn't bother to count all)
Buprestis haemorrhoidalis - between 12 - 15 (about 10 specimens)
Eurythyrea austriaca - 12.30-13 (3 specimens - only females)

There were 3 specimens of Chrysobothris affinis between 11-15 too, but accidentally landed, there were 2 trunks of Fagus sylvatica around.

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Ciao
Adrian