Scale diagram of the largest known dinosaurs (length and mass) of five major clades:   Sauropoda (Argentinosaurus huinculensis)   Ornithopoda (Shantungosaurus giganteus)   Theropoda (Spinosaurus aegyptiacus)   Thyreophora (Stegosaurus ungulatus)   Marginocephalia (Triceratops prorsus) Compared in size with a human. Each grid section represents 1 square meter. Scale based on Paul 2010[1]</ref> and Carpenter 2006.[2]