Titanomyrma was a species  of a giant ant. The T. Giganteum is the largest known ant fossil in the world. The queen T. Giganteum was 6cm (2.4in) long with a wingspan of 15cm (5.9in). The fossil of this giant ant when it was found was very well preserved.  It did not have a sting. It sprayed a kind of acid at the predators to protect itself and ate fresh food.

The latest one to be discovered was T. Lubei. It was discovered in 2011 in Wyoming. The giant winged queen ant fossil was 49.5 million years old. It was almost the size of a hummingbird. This fossil is the first body of a giant ant found in the Western Hemisphere.