User:Abyssal/Portal:Jurassic/DYK/4

... that over the course of the history of stegosaur research, their iconic back plates have been thought to function as armor plating, to regulate body temperature, or to attract mates?
... that the ammonite Hildoceras bifrons (pictured) has been used as an index fossil to help identify the age of rocks?
...that the prehistoric marine reptile Excalibosaurus (pictured) was named after King Arthur's sword because of the sword-like appearance of its upper jaw?
... that the extinct hangingfly genera Formosibittacus, Jurahylobittacus, and Mongolbittacus are only known from the Middle Jurassic of China?
... that Shantungosuchus, a small, primitive crocodile from the Cretaceous period, was terrestrial instead of aquatic?