👉 The term "cyrtidae" is a genus of prehistoric animals that lived during the Late Cretaceous period, around 201 to 167 million years ago. These creatures were closely related to some other extinct groups such as the Cenomanian and Early Oligocene mammals. They are characterized by their distinctive flattened heads with short necks, long, narrow legs, and a thick, muscular body. The genus includes several genera that share characteristics with other pre