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.
Titanosaur
Titanosaurs (members of the group Titanosauria) were a diverse group of sauropod dinosaurs which included "Saltasaurus" and "Isisaurus". The titanosaurs were the last surviving group of long-necked sauropods, with taxa still thriving at the time of the extinction event at the end of the Cretaceous. The group includes the largest land animals known to have existed, such as "Patagotitan"—estimated at long with a weight of —and the comparably sized "Argentinosaurus" and "Puertasaurus" from the same region. The group's name alludes to the mythological Titans of Ancient Greece, via the type genus (now considered a "nomen dubium)" "Titanosaurus". Together with the brachiosaurids and relatives, titanosaurs make up the larger clade Titanosauriformes.