👉 Cimeliidae are a family of extinct, small-to-medium-sized mammals that lived during the Late Cretaceous period, approximately 69 million years ago. These animals were characterized by large, elongated heads and a distinctive, sharp-edged tail. The specific names of these species include "Cimelius," which is a common name for various types of cimeliids, including the most well-known group, "Cimeliidae."
