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 1996, the palaeontologist Paul Sereno and colleagues described a new skull of the related genus "Carcharodontosaurus" from Morocco, a theropod described in 1927 but previously known only from fragmentary remains (the original fossils were destroyed in World War II). They estimated the skull to have been long, similar to "Giganotosaurus", but perhaps exceeding that of the "Tyrannosaurus" "Sue", with a 1.53 m (5 ft) long skull. They also pointed out that carcharodontosaurs appear to have had the proportionally largest skulls, but that "Tyrannosaurus" appears to have had longer hind limbs. In a 1995 interview for a "Science News" article entitled "New Beast Usurps "T. Rex" as King Carnivore", Sereno noted that these newly discovered theropods from South America and Africa competed with "Tyrannosaurus" as the largest predators, and would help in the understanding of Late Cretaceous dinosaur faunas, which had otherwise been very "North America-centric". In the same issue of "Science" in which "Carcharodontosaurus" was described, the palaeontologist Philip J. Currie cautioned that it was yet to be determined which of the two animals were larger, and that the size of an animal is less interesting to palaeontologists than, for example, adaptations, relationships, and distribution. He also found it remarkable that the two animals were found within a year of each other, and were closely related, in spite of being found on different continents. 
In a 1997 "Science News" interview, Coria estimated "Giganotosaurus" to have been 13.7 (45 ft) to 14.3 (47 ft) m long and weighing based on new material, larger than "Carcharodontosaurus". Sereno countered that it would be difficult to determine a size range for a species based on few, incomplete specimens, and both palaeontologists agreed that other aspects of these dinosaurs were more important than settling the "size contest". In 1998, the palaeontologist Jorge O. Calvo and Coria referred a partial left dentary containing some teeth (MUCPv-95) to "Giganotosaurus". It had been collected by Calvo near Los Candeleros in 1988 (found in 1987), who described it briefly in 1989, while noting it may have belonged to a new theropod taxon. Calvo and Coria found the dentary to be identical to that of the holotype, though 8% larger at 62 cm (24 in). Though the rear part of it is incomplete, they proposed that the skull of the holotype specimen would have been long, and estimated the skull of the larger specimen to have been long, the longest skull of any theropod.