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Saurischia and Ornithischia are two subclasses within the larger class of dinosaurs known as Dinosauria. Saurischia includes dinosaurs with a lizard-like hip structure, whereas Ornithischia includes dinosaurs with a bird-like hip structure.

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What are the names of the two major groups of dinosaurs?

The two major groups of dinosaurs are the Saurischia (lizard-hipped dinosaurs) and the Ornithischia (bird-hipped dinosaurs). These groups are distinguished by differences in their pelvic bone structure.


Is the kronosaurus a true dinosaur?

Kronosaurus is not and never was believed to have been a dinosaur. They're Pliosaurs which is a family of the Order Sauropsida. The Dinosaurs and Sauropsids all belong to the Class Reptilia, but there the relationships end. The Dinosaurs are classified further into two separate Orders -- the Ornithischia and Saurischia.


Two major groups of dinosaurs in the Jurassic period?

The two orders of the Superorder Dinosauria are Saurischia and Ornithischia, meaning the lizard-like pelvic girdle and the bird-like pelvic girdle. The classification is a little strange in that the birds are almost certainly descended from the Saurischia.


5 types of Dinosaurs?

The five main types of dinosaurs are Theropoda, Sauropoda, Ornithopoda, Ceratopsia, and Thyreophora. The first two were lizard hipped, belonging to Saurischia, and rest were bird hipped, members of Ornithischia.


Is a caudipteryx a lizard hipped dinosaur or a bird hippedd?

Caudipteryx belonged to the Saurischia ("lizard hipped"). But remember: so do birds. Birds have their pubes pointing backwards, just like the Ornithischia ("bird hipped") but they weren't onithischians themselves. So you can be a saurischian whatever the position of your pubes. As it happened Caudipteryx had forward pointing pubes, as typical for Saurischia - but it is not a decisive feature.


What is the first known flying dinosaur?

There are no known flying dinosaurs. Dinosaurs belonged to either Order Ornithischia ("bird-hipped") or Order Saurischia ("lizard-hipped"). All known flying reptiles belonged to Order Pterosauria instead.


What were the basic types of dinosaurs?

There were two main groups, Saurischia (lizard hipped) and Ornithischia (bird hipped). The former is further divided into Sauropodomorpha and Theropoda, while the latter is divided into Thyreophora (stegosaurs and ankylosaurs), Neornithischia (hadrosaurs and others), and Marginocephalia (ceratopsians and pachycephalosaurs).


Which of the three taxa of dinosaurs which do birds belong?

Dinosaurs were divided into two big groups: ornistichia (bird hip) and saurischia (lizard hip). The confussing part is that scientists believe that birds evolved from a group of therapods similar to small velociraptors and therapods are saurischia.


How is a brontosaurus like a tyrannosaurus?

Both Brontosaurus and Tyrannosaurus belonged to the order Saurischia. Saurischia is the order that includes all lizard hipped dinosaurs.


What does the term ornithischia mean when referring to dinosaurs?

bird hipped


What family is the velociraptor in?

Animilia, Reptilia, Dinosauria, Saurischia, Theropoda, Dromaosauridae


What kind of anmail was a stegosaurus?

Stegosaurus was a stegosaurid dinosaur. Stegosaurs belong to the clade Thyreophora, which in turn belongs to the order Ornithischia, or bird hipped dinosaurs. Dinosaurs are archosaurian reptiles, and reptiles are a class of vertebrate animals.