Tyrannosaurus is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex, commonly abbreviated to T. rex, is a fixture in popular culture.
Carcharodontosaurus is a genus of carnivorous carcharodontosaurid dinosaurs that existed between 100 and 93 million years ago, during the late Albian to early Cenomanian stages of the mid-Cretaceous Period.
Spinosaurus is a genus of theropod dinosaur which lived in what is now North Africa, from the lower Albian to lower Cenomanian stages of the Cretaceous period, about 112 to 97 million years ago.
Based on Paul Sereno’s new reconstruction.
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Baryonyx is a genus of carnivorous saurischian dinosaur first discovered in clay pits just south of Dorking, England, and later reported from fossils found in northern Spain and Portugal. It is known to contain only one species, Baryonyx walkeri.
Nanotyrannus is a genus of tyrannosaurid dinosaur. It is known only from two specimens which may be juvenile specimens of the contemporary species Tyrannosaurus rex.
Dimetrodon is an extinct genus of synapsid that lived during the Early Permian, around 295–272 million years ago. It is a member of the family Sphenacodontidae.