What is "short-headed"

Usage examples of "short-headed".

During the course of the twentieth century it yielded some of the earliest species of apes and other early primates, whales, elephantlike mastodons, strange and immense rhinoceroslike creatures equipped with massive horns, an array of small mammals, giant sea snakes, both long and short-headed crocodilians, turtles of several types, sharks, rays, lungfish and early catfish, birds, and many more.