Deinosuchus:

Deinosuchus is an extinct genus of alligatoroid that lived 80 to 73 million years ago, in the Late Cretaceous period. The name Deinosuchus means "terrible crocodile" and is derived from the Greek δεινός/deinos ("terrible") and σουχος/suchos ("crocodile"). A top predator in the coastal regions of eastern North America, Deinosuchus was capable of killing and eating large dinosaurs.

Thought for several decades to be the largest crocodilian that ever existed, Deinosuchus is known mainly from skull material. Recent studies have reduced its estimated length. Some other giant crocodilians, including Sarcosuchus (the "SuperCroc"), Purussaurus and Rhamphosuchus, were as big or bigger, but accurate comparisons are difficult as Sarcosuchus is the only species known from a largely-complete skeleton.