👉 Rhynchocephalian is a term used in the field of zoology and medicine to describe a group of organisms that are characterized by their lack of a brain, or skull. These creatures are known for having a large head with no eyes and lack of any sense organs such as taste, smell, hearing, or vision. They often live in arid environments and feed on plant material. The term rhynchocephalian is derived from the Greek words "rhynchos" meaning "