Eucladocerus orientalis. Illustration of the ancient deer Eucladocerus orientalis with branched antlers standing near a waterhole and trying to catch the scent of a predator. Eucladoceros or bush-antlered deer was a large deer from Pliocene to Pleistocene Europe, the Middle East and Central Asia. It reached 2.5 metres in length and stood about 1.8 metres tall at the shoulder, only slightly smaller than a modern moose. Eucladoceros was the first deer genus to have highly evolved antlers. It had a spectacular set of antlers which split into twelve tines per pedicle, and were up to 1.7 metres wide.