C. cadaverina is recorded in N America, probably Sibiria and Russian Far East, but have never been reported from Europe

Thanks to K. SZPILA for this comment

Following European countries with records of C. mortuorum are listed by Fauna Europea (excluding countries on this map): Austria, Belarus, Belgium, Czech Republic, Danish mainland, Faroe Is., French mainland, Hungary, Iceland, Italian mainland, Lithuania, North European Russia, Poland, Romania, Slovakia, Sweden, Switzerland... In Poland it is very common species with dozens of published records i...