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Galleria Tassonomica
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 Nota! La determinazione degli insetti necessita quasi sempre di un'indicazione geografica e temporale precisa.
Invitiamo quindi gli utenti ad inserire questi dati ogni volta che viene richiesta una determinazione o viene postata una foto di un insetto. I dati forniti dagli utenti ci consentiranno anche di attribuire un valore scientifico alle segnalazioni, contribuendo a migliorare e integrare le attuali conoscenze sulla distribuzione delle specie postate.
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 Discussione  |
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olaffio
Utente Senior
Città: Ozzano dell'Emilia
Prov.: Bologna
Regione: Emilia Romagna
3230 Messaggi
Flora e Fauna |
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Klaas Reißmann
Utente Senior
Città: Kamp-Lintfort, Nordreno-Vestfalia
Regione: Germany
1614 Messaggi
Tutti i Forum |
 Inserito il - 11 marzo 2012 : 23:34:47
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It would always be good in photos to have an information about the size of the beetle. Size matters very much sometimes. Cryptocephalus transiens has got the size of 4,4 - 5,5 mm. Its occurence is in the southeastern alps and in the Danube basin. I don't think that the Val di Fiemme is in the southeastern alps (looking at Google Earth), but in the middle alps and it even is not the Danube basin. So I don't think it is C. transiens. I does seem to be Cryptocephalus aureolus, but it also can be C. hypochaeridis. C. aureolus is much bigger than C. hypochaeridis. That's why I ask for the size of the beetle.
At least it is very difficult to identify the green Cryptocephalus by photo and there will always be some insecurity in identifying them.
Ciao
Klaas |
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olaffio
Utente Senior
Città: Ozzano dell'Emilia
Prov.: Bologna
Regione: Emilia Romagna
3230 Messaggi
Flora e Fauna |
Inserito il - 12 marzo 2012 : 07:36:30
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Thanks for your quick answer! 
A couple of years ago I found a similar Cryptocephalus in the same place, and it was identified as Cryptocephalus transiens. So I thought the same for this one...but it seems not so easy ; Val di Fiemme infact is not in southeastern alps, but in middle-eastern alps.
About the size, if I can remember correctly, it was about 5-6 mm.
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Stefano
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Klaas Reißmann
Utente Senior
Città: Kamp-Lintfort, Nordreno-Vestfalia
Regione: Germany
1614 Messaggi
Tutti i Forum |
Inserito il - 12 marzo 2012 : 17:34:25
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Buon Pomeriggio Stefano,
it is important for those small Cryptocephalus that the size is not evaluated, but known, because of measuring it up. 5 mm could be you're right, 6 mm means you're not right in your identification.
I do trust very much in this pages:
Link
And they report Cryptocephalus transiens for norhtern Italy. Cryptocephalus transiens is a new species which was reported in former times as subspecies of Cryptocephalus hypochaeridis which is reported from northwestern Italy. Identification by looking at the genitalia and the punctation of the Elytra. The Elytra can't be seen well enough to differ between those two species and there still is C. aureolus it could also be.
Ciao
Klaas |
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olaffio
Utente Senior
Città: Ozzano dell'Emilia
Prov.: Bologna
Regione: Emilia Romagna
3230 Messaggi
Flora e Fauna |
Inserito il - 12 marzo 2012 : 22:05:22
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I also found these subjects in the same place a couple of days later. Same size of the previous one.
Maybe in these photos it's possible to see well the Elytreal punctation, but I think it's still impossible to identify the species..
Immagine:
197,42 KB
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Stefano
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olaffio
Utente Senior
Città: Ozzano dell'Emilia
Prov.: Bologna
Regione: Emilia Romagna
3230 Messaggi
Flora e Fauna |
Inserito il - 12 marzo 2012 : 22:05:49
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Immagine:
113,97 KB
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Stefano
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Klaas Reißmann
Utente Senior
Città: Kamp-Lintfort, Nordreno-Vestfalia
Regione: Germany
1614 Messaggi
Tutti i Forum |
Inserito il - 13 marzo 2012 : 00:40:59
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The mating beetles are totally different. This is genus Chrysolina. Hard to say, if it is C. herbacea, C. graminis or something of the italian fauna. The third is a different specimen, not the same as it is on the first photo. This one is, in my mind, Cryptocephalus sericeus.
Ciao
Klaas |
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olaffio
Utente Senior
Città: Ozzano dell'Emilia
Prov.: Bologna
Regione: Emilia Romagna
3230 Messaggi
Flora e Fauna |
Inserito il - 14 marzo 2012 : 23:02:24
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Ok! Thanks Klaas! You're very kind!
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Stefano
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Cryptocephalus sp.
