👉 Megascolecinae is a group of extinct marine reptiles that lived during the Paleogene period, approximately 235-209 million years ago. These creatures were characterized by their large size and slender body structure, which allowed them to swim efficiently in the water column. Their limbs were adapted for swimming, with a long, flexible neck and powerful jaws. Megascolecinae are known from fossils found in various locations around the world, including the United States and
