👉 Endopterygóticos, in medicine and phylogeny, are a group of animals that have an anterior end with a ventral (posterior) opening. These animals are characterized by having a single spine or a series of vertebrae (vertebrales), which is the main structure of their spinal column. They also have a specific type of body plan known as "endopterygótico", where they have a small head and a large tail, with the tail being
