Whether or not a Biblical word translated as a kind of serpent refers to something which may have been a dinosaur is context dependent. Sometimes a snake is just a snake. Sometimes a serpent is a Sauropod.
Dinosaur Classification
May 7th
Given that synapomorphies only occur after the process of evolution has started, and evolution is a consequence of sin, it's appropriate to change the spelling of synapomorphy to sinapomorphy.