Common Missouri Fossils. Trilobites. Trilobites are extinct sea creatures that were one of the first forms of life on earth. They ruled the world before the time of the dinosaurs. What do you think Trilobites are related to?. Trilobites Today.
Their closest living relative today is the horseshoe crab.
They are also related to the lobster and crab.
Yes. Did you know that ferns have leaves,
called fronds, which usually consist of leaflets.
A Passion Flower feather star