User:Abyssal/Portal:Jurassic/DYK/9
Appearance
![Illustration of a fossil Pleurosternon shell](http://upload.wikimedia.org/wikipedia/commons/thumb/1/19/Pleurosternon.jpg/100px-Pleurosternon.jpg)
- ... that, together with Platychelys, Pleurosternon is one of the few fossil genera with characteristics of both modern turtle suborders?
- ...that Castorocauda lutrasimilis, a recently described mammal relative that looked like an otter with a beaver's tail, evolved a semi-aquatic lifestyle 110 million years earlier than any other mammal-like animal?
- ... that Xinjiangtitan is a 32 metre sauropod dinosaur from Xinjiang in China?
- ... that the discovery of the fossil of Shenshou, a squirrel-like early mammal from the Tiaojishan Formation, pushed the origin of mammals back to the Late Triassic, 220 million to 200 million years ago?
- ... that Calsoyasuchus valleyceps, an extinct crocodile relative from the Early Jurassic, has a deep groove in its skull from which its species name, "valley head", derives?