Formicariidae is a family of smallish suboscine passerine birds of subtropical and tropical Central and South America known as antthrushes.

The long, powerful legs (which lend the birds a distinctive upright posture) and an essentially vestigial tail aid this lifestyle.

Molecular phylogenetic studies indicated that the Formicariidae as previously delimited were highly paraphyletic, judging from comparison of several mt and nDNA sequences.

On the other hand, at least a large proportion of the Rhinocryptidae (tapaculos), including the type genus Rhinocrypta, seem to be closer to the antthrushes, but are still considered a distinct family.

It is based on a large molecular phylogenetic study of the suboscines by Michael Harvey and collaborators that was published in 2020.