[dread78645]

You might find this study interesting. How about an ERV found in chimps, gorillas, baboons and macaques but not found in orangutans, siamangs, gibbons or humans?

"Eichler and colleagues found over 100 copies of PTERV1 in each African ape (chimp and gorilla) and Old World monkey (baboon and macaque) species. The authors compared the sites of viral integration in each of these primates and found that few if any of these insertion sites were shared among the primates. It appears therefore that the sequences have not been conserved from a common ancestor, but are specific to each lineage."

[so_real]

Keep reading :-) If the subsequent insertions are truly not orthologs, and "few if any" are, it is still problematic that gorillas and chimps were subject to later re-insertion but humans were not (resistance/susceptibility hypothesis) despite their overlap during the Miocene era. My mind is open and I patiently await the results of further research.