It is known only from the early Triassic of Poland.

However, the last therocephalians became extinct by the early middle Triassic.

It dates back to the Early Triassic, about two hundred and fifty million years ago.

But archosaurs quickly became the dominant land vertebrates in the early Triassic.

Up to the early Triassic, their teeth were sharp, indicating an insectivorous diet.

It dates back to the Early Triassic, greatly extending the temporal range of the family.

Fossils have been found from Russia and date back to the Early Triassic.

They gave rise to the Erythrosuchidae some time in the Early Triassic.

The oldest teleost fossils date back to early Triassic.

They arose during the Permian and died out during the early Triassic.