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Thyreophora: Armored Dinosaurs like Ankylosaurus and Stegosaurus. These are what I would consider to be the âmain typesâ of dinosaurs. Technically speaking, each of these families are divided into even smaller sub groups, but this is the basic way Iâve looked at it for most of my life.
How many types of dinosaurs are known? Approximately 700 species have been named. However, a recent scientific review suggests that only about half of these are based on fairly complete specimens that can be shown to be unique and separate species. These species are placed in about 300 valid dinosaur genera (Stegosaurus, Diplodocus, etc.), although about 540 have been named. Recent estimates suggest that about 700 to 900 more dinosaur genera may remain to be discovered.