Obviously it can't be more different from any kind of Cleridae. It's a Chrysomelidae of the subfamily Clytrinae. Check distribution for genus Coptocephala and Tituboea in http://www.biol.uni.wroc.pl/cassidae/European%20Chrysomelidae/clythrinae.htm. However I'm a bit confused about the images, they're both the same individual or different individuals? Can we see better photos, sharp, for see things as the leg colour or the shape of antennae?
Thanks, that's a very interesting reply. Although there are a number of Coptocephala species on Mainland Greece none have been recorded on Crete so far (according to Fauna Europea), nor have any other members of the subfamily Clytrinae. (Tituboea does not appear on the mainland either).
These were two separate observations made five days apart with approximately 150m between observation points so whether they are the same individual or not I cannot say. I have one further photograph which does not tell us a lot more but the head and leg colour would appear to be black.
I will pass the photos on to my coleopteran contact at the Natural History Museum of Crete and endeavour to find some more examples in the meantime.
Thanks very much for your ID.