- American ▁anth rop olog ists ▁highlight ▁that ▁even ▁if ▁regional ▁population ▁continu ity ▁can ▁be ▁proven , ▁this ▁does ▁not ▁translate ▁into ▁lingu istic , ▁much ▁less ▁eth nic ▁continu ity . ▁Both ▁aspects ▁of ▁culture ▁can ▁be ▁modified ▁or ▁dr ast ically ▁changed ▁even ▁in ▁the ▁absence ▁of ▁large - scale ▁population ▁flux . ▁ ▁Prom inent ▁in ▁the ▁discuss ions ▁are ▁certain ▁bro och ▁forms , ▁seen ▁to ▁derive ▁from ▁Il ly rian ▁pro tot ypes . ▁However , ▁a ▁recent ▁analysis ▁revealed ▁that ▁whilst ▁broad ▁analog ies ▁are ▁indeed ▁evident ▁to ▁Iron ▁Age ▁Il ly rian ▁forms , ▁the ▁insp iration ▁behind ▁K oman i ▁fib ula e ▁is ▁more ▁closely ▁linked ▁to ▁Late ▁Roman ▁fib ula e , ▁particularly ▁those ▁from ▁B alk an ▁for ts ▁in ▁the ▁present - day ▁Ser bia ▁and ▁north western ▁Bulg aria . ▁This ▁might ▁suggest ▁that ▁after ▁the ▁general ▁collapse ▁of ▁the ▁Roman ▁l imes ▁in ▁the ▁early ▁ 7 th ▁century , ▁some ▁late ▁Roman ▁population ▁with d rew ▁to ▁Ep irus . ▁However , ▁ass embl ages ▁also ▁have ▁many ▁" bar bar ian " ▁arte fact s , ▁such ▁as ▁S lav ic ▁bow - f ib ula e , ▁A var - sty led ▁bel t ▁mount s ▁and ▁Carol ing ian ▁glass ▁vessels . ▁By ▁contrast , ▁beyond ▁the ▁immediate ▁Adri atic ▁litt oral , ▁most ▁of ▁the ▁west ▁B alk ans ▁( including ▁D ard ania ) ▁appears ▁to ▁have ▁been ▁dep op ulated ▁after