👉 Perissological is a term used in paleontology to describe the fossil record of animals that have lived on land for at least one million years. It refers specifically to the fossil record of early mammals, such as dinosaurs and early birds, which are considered the ancestors of modern-day mammals. The term "peris" means "on land," and "ecological" refers to the study of life on land. Therefore, perissology is a field that studies the fossil record of early animals that
