How gorgonopsians lived

A recent study on gorgonopsian bone histology revealed that they experienced rapid growth during favourable conditions but also showed numerous annual growth marks in their bones. After the Permo-Triassic mass extinction some 252 million years ago, surviving species in the Early Triassic grew quickly and reached adulthood within a year, likely due to harsher conditions and high mortality rates. In contrast, gorgonopsians took longer to mature, and their delayed reproductive development may have hindered their ability to recover, making long-term survival in the Early Triassic increasingly difficult.

https://doi.org.10.1111/joa.14201