The Animantarx was an approximately 3-metre-long dinosaur with bone plate armour.  The Animantarx was an approximately 3-metre-long dinosaur with bone plate armour. Only one skeleton of the dinosaur has ever been found so we don't really know so much about it. It lived during the Upper Cretaceous period at the time of Argentinosaurus and Giganotosaurus and fed on plants.
 
Dimensions 5.315X2.559X3.15 Inch (W X D X H)