010025 - Nicely Preserved Knightia Fossil Fish Eocene Green River Fm, Wyoming (USA) Elosuchus In the following link you

In the following link you could find an article that deals with the study of a population of isolated teeth that come from this sector

The rostrum most likely would have had electrosensors to detect food in the water below them like most modern sharks and some rays

dunklei there were two to five barbs on each tooth

Triceratops horridus

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010025 - Nicely Preserved Knightia Fossil Fish Eocene Green River Fm, Wyoming (USA) Elosuchus In the following link youMagnificent specimen with detailed preservation. You can see the whole bone structure as well as details of the jaw and its small teeth. 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.