1) Family hadrosauridae 2) Reptile family 
Hadrosaurids, or duck-billed dinosaurs, were the biggest ornithopods (a type of ornithischian or bird-hipped dinosaurs). They could walk on two or four legs. These plant-eaters lived during the late Cretaceous period . Hadrosaur means 'big or bulky lizard.' Hadrosaurs had a wide, flat, toothless beak, hundreds of cheek teeth and powerful jaws. Thei...
[n] - duck-billed dinosaurs
family Hadrosauridae noun duck-billed dinosaurs; upper Cretaceous