👉 Archaeopterygians, also known as "archaic tetrapods," are a group of extinct reptiles that lived during the Paleocene epoch (about 53 million years ago) and were characterized by their long necks, large jaws, and sharp teeth. They were one of the largest groups of prehistoric animals in Earth's history, with over 100 species living across North America, Europe, Asia, and Africa. Archaeopterygians are classified
