How long did the deinosuchus live?

It is difficult to know how long dinosaurs have lived. However it seems that the smaller the animal is the shorter the lifespan is. So it could be that a dinosaur like a Hypsilophodon might only live to about 20 years, but this is guess work by what I have read. A Velociraptor is also a small dinosaur approximately 6 feet long so they are about the same size as the Hypsilophodon, and the web-page below was guess that a velociraptor might live to 20 years. Reference: http:/dinosaurs.about.com/od/dinosaurbasics/a/lifespans.htm