Great, so you will provide me with what google didn't : a page exlpaining the Sahara crocodiles with evolution ...
ping
Saharan crocs don't really link up with evolution. They are too recent, and probably died off as the Sahara died out. But some may still live.
Maybe you ought to hone your Googling skills, as I found this very interesting item:
http://www.flmnh.ufl.edu/natsci/herpetology/NEWSLETTER/news192p4-6.htm