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The pectoral fins were narrow and pointed
Trilobites are extinct arthropods that form the class Trilobita
It is one of the most bizarrely shaped genera
Location: Utah Late Jurassic
and Paranthropus boisei
Stegoceras, skull dome (Pachycephalosaurus) Troodon The pectoral fins were narrowThis specimen is the dome made of very thick bone from the head of Stegoceras. It is removable from its base for study. 4 inches long 3 inches wide 2. 25 inches thick 7x6 inch matrix Pronounced STEG oh CEER us, Stegoceras (meaning "roofed horn") was a bipedal, herbivorous, dome headed, plant eating dinosaur from the late Cretaceous period, about 76 65 million years ago. This pachycephalosuar was about 7 ft (2 m) long and lived in what is now Alberta,