👉 The term "ergasilidae" refers to a family of extinct air-breathing vertebrates that lived during the Cretaceous period, approximately 68-65 million years ago. They are characterized by their unique skull structure, which is shaped like an eggshell and has three rows of teeth aligned in a V shape. This type of skull development likely allowed them to glide through the air with ease, enabling them to breathe underwater or on land for extended periods without suffocation.
