Ancient fish scales and vertebrate teeth share an embryonic origin

Why do amphibians not have scales when they are closer to fish than reptiles? - Quora

Scale-eating fish adopt clever parasitic methods to survive

developmental biology University of Cambridge

Why do almost all vertebrate animals have the same anatomy? - Quora

DT News - UK - Researchers discover the origin of teeth

DT News - International - Ancient fish scales and vertebrate teeth share an embryonic origin

Ancient 'shark' from China may be humans' oldest jawed ancestor

DT News - International - Ancient fish scales and vertebrate teeth share an embryonic origin

The Evidence Is Building That Our Teeth Evolved From Fish Skin : ScienceAlert

Development of epidermal scales during reptilian embryogenesis. (A)

Fishes and Sharks: Origins of Jaws in Vertebrates - Lesson

Ancient 'shark' from China may be humans' oldest jawed ancestor

Evolution of the vertebrate skeleton: morphology, embryology, and development, Zoological Letters