Simosuchus and the trouble with "living fossils".

When people think of Crocodyliformes, they probably think primarily of the living crocodylians; the alligators, caimans, crocodiles and gavials that inhabit the waters of our Holocene world. They think of large, scaly, man eating beasts with powerful jaws that managed to outlive the dinosaurs and are always lurking right beneath the surface of some river or swamp to snatch up anything that comes along and disturbs the water's edge. And for the most part, they think they are all relatively similar. Sure, some may grow larger than others, they have different shaped snouts, and they live in somewhat different habitats, but for all intents and purposes, a crocodylian is a crocodylian. Just another toothy grin in a sea of menacing reptiles.