When I was in 9th grade (1994-5) one of my teachers had the class try out this computer game. I don't recall the title but it was a resource management game and you were in charge of running a zoo where all the animals were dinosaurs. It was too early for 'Zoo Tycoon' so I'm drawing a blank right now. Ring any bells?
I seem to remember it being... darker, not quite so colorful.
Ok, I found that the game had two different versions that changed the style a little bit, the DOS version, which was the one on the picture i showed you, and the Macintosh version: