All told , about 60 different vertebrates became extinct , including the Diprotodon family ( very large marsupial herbivores that looked rather like hippos ) , several large flightless birds , carnivorous kangaroos , Wonambi naracoortensis , a 5 metre serpent , a five metre lizard and Meiolania , a tortoise the size of a small car .
About 60 different vertebrates became extinct , including the Diprotodon family ( very large marsupials that looked rather like hippos ) , several large flightless birds , meat eating kangaroos , a five metre lizard and Meiolania , a tortoise the size of a small car .