The inturned head of the femur (the beginnings of the full right-angled femur head seen in dinosaurs and in a different from in mammals); the straight knee joint; the reduced hinge-like ankle joint (technically termed the advanced mesotarsal, or AM, ankle); the long toes and the digitigrade posture of the foot, in which only the toes touch the ground, not the sole of the foot as in earlier archosaurs – and in humans today.
Most of the dinosaur-like characters are also seen in the flying pterosaurs. Certain paleontologists argue that Lagosuchus, the pterosaurs, and the dinosaurs together form a major clade that arose in the Middle to Late Triassic, some 230 million years ago.
The dinosaur-like synapomorphies of this clade, and their further modification in the dinosaurs proper, are part of a major series of related anatomical changes that took place among the archosaurs during the Triassic, and which may have been the key to the origin of the dinosaurs.
Related Websites - Ruptured Peroneus Longus Tendon So as I mentioned in my weigh in post, on Tuesday I was playing volleyball at the local community center.... It was a 3 on 3 game and we were receiving. My teammate passed the ball...
- Dinosaur Bedding for Tough Kids Bedding for kids can have a hard life and not last very long with all of the abuse and other things that happen to it. If you are looking to replace bedding than a good...
- How to Become a Serious Coin Collector There are two different types of coin collectors in this world: those who are serious about their collecting, and those who collect for simple enjoyment. While serious collectors do get enjoyment out of coin collecting,...