Nice find. I had no idea South America was a likely cradle for ants. Perhaps that explains why the anteater evolved in South America as well. If there's a lot of individuals from a given species in some area, something is likely to evolve to eat them.

Obligatory XKCD: https://what-if.xkcd.com/123/

'A 113-million-year-old hell ant that once lived in northeastern Brazil is now the oldest ant specimen known to science, finds a new report. The hell ant, which was preserved in limestone, is a member of Haidomyrmecinae -- an extinct subfamily that only lived during the Cretaceous period. These ants had highly specialized, scythe-like jaws that they likely used to pin or impale prey.'

Quite nice preservation! The images in the original article are definitely worth checking out:

https://doi.org/10.1016/j.cub.2025.03.023

Discover and Science news have some images if you can't access Current Biology directly:

https://www.discovermagazine.com/the-sciences/113-million-ye...

https://www.science.org/content/article/oldest-ant-fossil-ev...