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Concavenator
There are two reasons why the Concavenator is indeed a weird dinosaur. Firstly, this dinosaur has a weird triangular-shaped hump located on the center portion of the back. Maybe the hump supports its home and skin’s ornate snail, or strangely, just a triangular hump. Secondly, quill knobs were decorated in Concavenator’s forearm and might sprout the colorful feathers during their mating season; this early Cretaceous theropod was probably lizard-skinned like the Allosaurus.