A family tree for heavyweights.
Rice
D W
DW
D000818:Animals; D001188:Artiodactyla / Q000145:classification*; D002591:Cetacea / Q000145:classification; D049672:History, 19th Century; D008322:Mammals / Q000145:classification*; D010802:Phylogeny; D014907:Whales / Q000145:classification*