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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.
In 1888, a man named Harry Seeley proposed a way of classifying dinosaurs into two groups by looking at their hip structure, these groups are called Saurischia (lizard hipped) and Ornithischia (bird hipped). The two groups can be further broken down into sub-groups such as families, sub-families and so on.etâs take a look at some of the interesting sub-groups and examples of the dinosaurs that are part of them. Saurischia (lizard hipped dinosaurs). Theropods-The name Theropod means âbeast footâ and this group includes all of the carnivorous (meat eating) dinosaurs.