Cervus megaceros; Print; The Irish elk (Megaloceros giganteus) also called the giant deer or Irish giant deer; is an extinct species of deer in the genus Megaloceros and is one of the largest deer that ever lived. Its range extended across Eurasia during the Pleistocene; from Ireland to Siberia to China. A related form is recorded in China during the Late Pleistocene. The most recent remains of the species have been carbon dated to about 7; 700 years ago in Siberia.; skeleton