A close contender in size is a giant theropod from South America, "Giganotosaurus carolinii", whose holotype specimen is estimated at in length, and another specimen is estimated at in length. A study however presents "Carcharodontosaurus" as a close contender in size to "Spinosaurus aegyptiacus". Some other notable giant theropods (e.g. "Tyrannosaurus rex", "Acrocanthosaurus", and "Mapusaurus") may also have rivaled these giant theropods in size. Another very large theropod was "Deinocheirus", being tall at hips,