Forum Entomologi Italiani

Buongiorno.

This Curculionidae is from august from a coastal vegetation in Istria. Length ist 4,2mm. My guess would be Caulostrophus subsulcatus, but I am not sure, whether it is not genus Strophosoma. What is it?

Grazie,
Michael

Sembrerebbe un Trachyphloeino.
Probabilmente un Cathormiocerus sp.

Provo a controllare i caratteri.

Ciao
Giuseppe

Good morning !!!
Caulostrophus (Brachyderini) : claws fused.
Here, the claws are free.
It belongs to genus Cycloderes (Tanymecini), as I think. Most probably Cycloderes (Cycloderes) pilosulus (Herbst, 1796).

George

L'aspetto da Cycloderes c'è.
Non conosco direttamente il C. pilosulus ma 4,2 mm mi sembrano pochi.
Una foto laterale della testa mi aiuterebbe.

Ciao
Giuseppe

Good morning!

First of all thank you for your answers. Oh how wrong I was....

Here is a side picture of the head. Is it enough to say something?

When I looked in the Fauna Europaea I first was scared how many Cycloderes species there are. But then I saw that they are mainly in Spain or Sicily. In the end only a handful seem to be possible:
guinardi, canescens, fritillum have, as far as I read, mainly white bristles on the elytrae, whereas in my specimen they are all without exception black.

The distribution of pilosulus seems a bit northern, but maybe it's possible.
For setulosus, which is also reported for Croatia, I can't find any informations of pictures.

Is there a key for Cycloderes species? Or what exactly have I to look for at the head?

Grazie,
Michael

Good morning again !!!
- In Cycloderes there is a fringe of long hairs at the tip of pronotum, under the eyes. I think that we are OK for this, it is really a Cycloderes.
- Distribution of C. pilosulus, from COOPERATIVE CATALOGUE OF PALEARCTIC COLEOPTERA CURCULIONOIDEA :
C. pilosulus Herbst, 1795: 292 (Curculio) [RN]
E: AU BU BY CR CZ GE HU KZ LT MD PL RO SK ST UK
A: AR ES KI KZ TD TM TR UZ WS
Croatia is included !!!
Also it exists in northern Greece (there is 1 specimen in the collection here, with brown bristles - not really black ones / length 4.4 mm. ) and in Iran.

- I don't know nothing about Cycloderes setulosus, nor the original description. There is only a note from Desbrochers des Loges (1904) about Thylacites minimus (synonym of Cycloderes setulosus) here (pages 39-40 / 45-46 of the pdf):
https://ia800208.us.archive.org/21/item ... 13chat.pdf

G.

Sì, è il carattere visibile con la foto laterale.
E' un Cycloderes.
Oltre non arrivo.

Ciao
Giuseppe

Hello,

the bristles at the side of the pronotum can't really be seen on the photo, but they are there. So it's a Cycloderes. Since there are no informations about C. setulosus besides the description of Desbrochers, which is not really helpful here, I regard this spieces as a cryptic species and will label my specimen Cylcoderes cf. pilosulus.

Thanks to you both for your help.
Michael