Hadrosauroidea
Hadrosauroidea is a clade or superfamily of ornithischian dinosaurs that includes the "duck-billed" dinosaurs , or hadrosaurids , and all dinosaurs more closely related to them than to "Iguanodon" . 
<triplet> ornithischia <subj> dinosaur <obj> parent taxon <triplet> dinosaur <subj> clade <obj> instance of