For dinosaurs, I don't know any off the top of my head, but look for anything involving Deep Tolguth, Tolguth, or Mediogalti Island. I'm not familiar with any modules there, but Into the Darklands has the basic Deep Tolguth information (not much, but enough to make me want to run it).
As far as jungles go, basically the entire Serpent's Skull adventure path is set in the jungle. It sounds like almost exactly what you're looking for: jungles, factions, and ruins. I've heard mixed reviews from running it, but all the Adventure Paths are great for mining ideas and encounters from.
Cheers!
Kinak