Bigmouth is a Land Before Time name for Saurolophus and perhaps other types of hadrosaur along with swimmer and possibly duckbill (said by Mr. Threehorn and Littlefoot's grandpa in The Land Before Time V but dinosaurs would not know what a duck is (they had not even evolved yet) and even if they did would probably not use the word duck to describe them). Dil may be a Bigmouth Belly dragger. Baryonyx and Spinosaurus are maybe Bigmouth Sharpteeth.

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