Primitive men with spears hunting a glyptodon (Greek for 鈥榞rooved or carved tooth') a large; armored mammal of the family Glyptodontidae; related to the armadillo.Colour printed illustration by Heinrich Harder from 鈥楾iere der Urwelt' Animals of the Prehistoric World; 1916; Hamburg. Heinrich Harder (1858-1935) was a German landscape artist and book illustrator. These images come from a series of prehistoric creature cards published by the Reichardt Cocoa company in 1908. Natural historian Wilhelm Bolsche wrote the descriptive text.