Some of the reptiles ancestral to the crocodiles filled very different niches than the modern forms. Some ran, though still on four limbs, and others were bipedal!
Prehistoric Crocodiles- The Ancient Cousins of the Dinosaurs
A New Species of Araripesuchus (Crocodylomorpha, Mesoeucrocodylia) From the lower Cretacesous of Patagonia (Aregentina) (this is a scientific publication)
Carnivora: Dog-Croc Araripesuchus wegeneri (scroll down to get to the article)
