👉 Aulacomerus is a genus of extinct mammals that lived during the Late Triassic period, around 256 million years ago. It was classified as a dinosaur-like creature due to its elongated body structure and large, powerful jaws that allowed it to breathe through its nostrils. Aulacomerus is known for its unique skull features, including several large, curved teeth on the back of its head, which were adapted for feeding on small animals like insects and birds.