👉 In biology, a cladonioid is an evolutionary group that includes all organisms that share a common ancestor. The term was coined by Charles Darwin in his book "On the Origin of Species" to describe the groups of organisms that developed from one another over time. Cladonioids are considered to be among the most well-studied and well-understood groups of organisms in biology, with many researchers studying their evolutionary history and relationships. They include a wide range of species, including all vertebrates
