Sinosauropteryx
Three specimens have been assigned to "Sinosauropteryx prima": the holotype GMV 2123 (and its counter slab [opposite face], NIGP 127586), NIGP 127587, and D 2141. Another specimen, IVPP V14202, was assigned to the genus but not to the only species by Zhang and colleagues. The assignment of an additional larger specimen to "S. prima", GMV 2124, was later found to be in error. All of the fossils were found in the Jianshangou or Dawangzhangzi Beds of the Yixian Formation in the Beipiao and Lingyuan regions of Liaoning, China. These fossil beds have been dated to 124.6–122 million years ago, during the early Aptian stage of the Early Cretaceous.
List of creatures in Primeval
"Edaphosaurus" is a Synapsid reptile from the Permian period, about 280 million years ago and has a sail like "Dimetrodon" and "Spinosaurus". It was included in Connor's Database.
The "Edaphosaurus" resembled much of what people would believe today to be a "dinosaur", however it lived during the Permian period (about 280 million years ago) which is before most dinosaurs. It was very similar to the "Dimetrodon" in its appearance, except there were generally smaller. They were about a foot shorter than their cousin the "Dimetrodon"; about 8 feet long. Like most lizards in order to walk, its body moved from side to side. This is a characteristic of animals with legs on its side rather than under it. The "Edaphosaurus" also had a sail on its back, but it was smaller and shaped differently from that of the "Dimetrodon".
"Edaphosaurus" were most active during the day. They were cold blooded animals which meant that their temperature was regulated by external factors (the sun, wind, rain). To get warm during the day these animals would tilt their "sails" towards the sun, and the blood going through this sail would heat up. "Edaphosaurus" were herbivores, meaning they only ate plants. This is evident in the teeth of the animal. "Edaphosaurus" teeth were much flatter than that of the "Dimetrodon", and its skull was much shorter overall which indicates they had smaller jaw muscles. The "Dimetrodon" skull was larger because of its big jaw muscles, and its sharp teeth that were used for shearing meat.