palaeontologists are referring to chilesaurus diegosuarezi as a ` platypus ' dinosaur because of its bizarre combination of characteristics , including its small skull and feet .
the animal is proving to be an evolutionary jigsaw puzzle because it belongs to the theropod group of dinosaurs - which includes the famous meat eaters velociraptor , carnotaurus and tyrannosaurus , because it 's one of the most unusual creatures in the animal kingdom that