99 million year old beetle in Amber shows adaptations for living in ant colonies

[Scylla]

Clown beetles are adapted to live in ant colonies. This fossil in amber places this evolutionary trick back in the Cretaceous. This also implies "host switching" by highly adapted parasitic creatures since the probable host ant species no longer exist. 

 

https://m.phys.org/news/2019-04-beetles-successfully-freeloaded-million-years.html