Wikipedia
Anoplotheriidae is an extinct family of even-toed ungulates ( order Artiodactyla). They were endemic to Western Europe during the Eocene and Oligocene epochs about 48—23 million years ago (Mya), existing for about 25 million years. They disappeared at the end of the Oligocene, leaving no survivors today.
They were most likely mid-sized terrestrial herbivores not too distantly related to camels, but smaller and low-slung with long and thick tails, and rather generalistic. The climate during their time was warmer than today, and their habitats were probably subtropical or even tropical, with plentiful rainfall and abundant vegetation. Tropical rainforest may at least initially have occurred all over the Anoplotheriidae's range. Ecologically, they may have resembled a large duiker of our time (e.g. the similarly sized yellow-backed duiker Cephalophus silvicultor), foraging in dense growth where their low builds would have been advantageous.