Megacerine

The Irish elk (Megaloceros giganteus) was an extinct species of deer known for its immense size and exceptionally wide antlers, which could span up to 4 meters (13 feet). This species was widespread in Europe and Asia during the Pleistocene Epoch. Despite its name, the Irish elk was most abundant in Ireland. Many scientists believe it went extinct during the last ice age, possibly due to starvation, though some fossils suggest survival into warmer periods.1

Fallow deer (Dama dama) are the only surviving members of the Megacerines, a diverse lineage of deer that included the Irish elk. Fallow deer possess large, flattened antlers, unique among Old World deer. They are medium-sized and are often kept in parks and zoos worldwide.2