Pteranodon
Pteranodon (; from Greek πτερόν ( pteron, "wing") and ἀνόδων (anodon, "toothless") is a genus of pterosaur that included some of the largest known flying reptiles, with wingspans over 8 meters (26 feet). They lived during the late Cretaceous geological period of North America in present-day Kansas, Alabama, Nebraska, Wyoming, and South Dakota. More fossil specimens of "Pteranodon" have been found than any other pterosaur, with about 1,200 specimens known to science, many of them well preserved with nearly complete skulls and articulated skeletons. It was an important part of the animal community in the Western Interior Seaway.
Giganotosaurus
In 2005, the palaeontologist Cristiano Dal Sasso and colleagues described new skull material (a snout) of "Spinosaurus" (the original fossils of which were also destroyed during World War II), and concluded this dinosaur would have been long with a weight , exceeding the maximum size of all other theropods. In 2006, Coria and Currie described the large theropod "Mapusaurus" from Patagonia; it was closely related to "Giganotosaurus" and of approximately the same size. In a 2007, the palaeontologists François Therrien and Donald M. Henderson found that "Giganotosaurus" and "Carcharodontosaurus" would both have approached in length and in weight (surpassing "Tyrannosaurus"), and estimated the "Giganotosaurus" holotype skull to have been long. They cautioned that these measurements depended on whether the incomplete skulls of these animals had been reconstructed correctly, and that more complete specimens were needed for more accurate estimates. They also found that Dal Sasso and colleagues' reconstruction of "Spinosaurus" was too large, and instead estimated it to have been long, weighing , and possibly as low as in length and in weight. They concluded that these dinosaurs had reached the upper biomechanical size limit attainable by a strictly bipedal animal. In 2010, the palaeontologist Gregory S. Paul suggested that the skulls of carcharodontosaurs had been reconstructed as too long in general.