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Creoboter Urbanus
I think yours might be Creoboter urbanus (female?). Creoboter gemmatus has in my eyes the spots within the white area not at the margin. Please, verify!
http://www.butterfliesandthings.com/prod...
http://www.taxentomo.com/products/phasmi...
If we are not sure, then I suggest Creoboter sp. as scientific name.