010028 - Nicely Preserved Knightia Fossil Fish Eocene Green River Fm, Wyoming (USA) Dromaeosaur and rarely we can see

and rarely we can see a claw like the one we are displaying here

not filled

The complicated sedimentarian architecture of the layers where most large vertebrates are found makes the excavation methodology a real challenge

All the crocodylomorpha lived in this delta next to fish

this specimen presents an additional scientific interest given the classification difficulty

010028 - Nicely Preserved Knightia Fossil Fish Eocene Green River Fm, Wyoming (USA) Dromaeosaur and rarely we can seeMagnificent specimen with detailed preservation. You can see the whole bone structure as well as details of the jaw and its small teeth. Part of the digestive system is preserved and visible. From this type of fossilization, through taphonomy, many aspects of the original paleoenvironment can be learned. This type of preservation only occurs under certain very special circumstances, in the bottoms of lakes, with anoxic conditions, for example.