I wager that Apatosaurus (the first entry) should be Anatosaurus, and it could be an OCR issue from when whomever scanned it in.
I think we can assume that it is Anatosaurus.
I will gladly use any (and possibly all) dinosaur icons, as I have long had a plan for a side-quest that will involve dinosaurs.
Uatu, I bet between those of us on the forum here, you and Dinonykos most prominent amoung us can figure out some 1e stats by looking at other 1e critters and using the real-world info.
Not only does it look like we'll have a dinosaur expansion for the monster database, one could write up the stats for any "new" dinosaurs in a 1e format to be released to the greater AD&D community (I volunteer to do the write-up if we get that far).