Mammalodon is an extinct genus of archaic baleen whales, although it lacked baleen and retained teeth.It was discovered in 1932 in the Jan Juc Formation on the small Bird Rock island south of the Point Lillias peninsula in Torquay, Victoria in Australia (38.3°S 144.3°E / -38.3; 144.3, paleocoordinates 52.9°S 142.2°E / -52.9; 142.2). It is one of two genera in the family Mammalodontidae.