👉 Cercopithecoid, also known as a "cervical crocodilian," is an extinct species of crocodile that lived during the Late Cretaceous period (about 68 to 59 million years ago). The exact age and size of this species are not fully known, but scientists believe it may have been around 10 feet long at its most substantial. It was a large predator with a distinctive skull and jaw structure that allowed for powerful jaws and teeth.