Gnathostomata

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The spinal column in tetrapods is made up of five different regions of distinctly-shaped vertebrae:

Link #science illustration #paleontology #paleoart #palaeoblr #tarrasius #tarrasiidae #tarrasiiformes #actinopterygii #osteichthyes #gnathostomata #vertebrate #spinal column #vertebrae #hox genes #convergent evolution #id have two nickels #which isnt a lot but its weird that it happened twice