👉 Cuniculus is an extinct genus of mammals that lived during the Late Cretaceous period (about 79 to 65 million years ago) in North America. The exact age of this group is not well-established, but it is generally believed to have been around 78-80 million years old. The name "cuniculus" comes from the Latin word "cunus," which means "head." It was a common term used by scientists and historians at that