““Remarkable changes in [both] the skeleton and internal organs” were required to evolve turtles from non-turtles.””
“Another required change concerns the scapulae (‘shoulder blades’), which in other vertebrates are located outside of the rib cage, except in turtles, where they are located inside the rib cage (along with the humerus and several other bones).”
“Why is it that uniquely in turtles the shoulder blade lies inside the ribcage, instead of being located outside the ribcage as in all other tetrapods?”
“The origin of the turtle shell, which “contains over 50 dermal bones found in no other vertebrate order”, is still a major problem for evolution.”
“The tetrapod body plan requires not only extensive modification to evolve into a turtle, but also dramatic physiological changes. For example, because the turtle chest is not distensible, the turtle respiratory system is designed very differently from that of all other reptiles.”
Read this AMAZING article here: https://creation.com/pappochelys-turtle-evolution
Picture from: https://pixabay.com/vectors/cartoon-green-sea-turtle-2027744/ and https://pixabay.com/illustrations/skeleton-bones-halloween-skull-4567486/ accessed 1/6/23.