Tylosaurus Rex: Scientists name formidable extinct 43-foot ocean predator from Ice Age

Scientists formally described Tylosaurus rex, a giant mosasaur from northern Texas, as a new species.

Reanalysis of long-held museum fossils revealed distinctive skull and bone traits that set it apart.

The 43-foot marine reptile was an apex predator in the Late Cretaceous Western Interior Seaway.

The find adds a new giant predator to the fossil record and highlights the value of reexamining museum collections.