User blog comment:KrspaceT/Should non Reptiles appear in Jurassic Park?/@comment-5870856-20130501230807

Yes, they should.

There were some really cool non-reptile prehistoric creatures. Unfortunately, I doubt it would be possible to clone anything earlier than the Permian, but it would still be possible (and easier) to clone mammoths. They could cameo as part of a new project by InGen to repopulate the Russian steppes with the megafauna wiped out by early humans. And it could fight (and kill) T. rex at the end!