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Dinosaurs are divided into two main groups based on their hip structure: Saurischians and Ornithiscians. Saurischia means "lizard hipped" and Ornithischia means "bird hipped".
Saurischian hips had the pubis pointing forward and the ischium pointing backward. All the carnivorous dinosaurs (the theropods) and sauropods were saurischians.
Ornithischian hips had the pubis pointing backward and parallel to the ischium.
They include all the other dinosaur groups such as the ceratopsians and the ornithopods.
Ironically, birds do not descend from this type of dinosaur. Instead, they are descended from the theropods, who were saurischians.
What else can I help you with?
What are the 4 general types of plant-eating dinosaurs?
The main types of herbivorous dinosaurs are ornithopods, ceratopsians, Thereophora, and sauropods. A few types of theropods were herbivorous, too.
What were the types of dinosaurs?
There are five types of dinosaurs.
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.
What two main types of reptiles existed in the Mesozoic Era?
The two main types of reptiles that existed in the Mesozoic Era were dinosaurs and pterosaurs. Dinosaurs were land-dwelling reptiles that roamed the Earth, while pterosaurs were flying reptiles that ruled the skies.
What types of dinosaurs are vertebratezx?
All dinosaurs are vertebrates.
What types of dinosaurs are on ice age?
there was no dinosaurs during the ice age
How many types dinosaurs lived under the water?
there were no types of water dinosaurs. Diosaurs only lived on land.
What are the main crocodile ancestors?
dinosaurs are the main ancestors
What types of dinosaurs were there?
allosaurusankylosaurusapatosaurusatlantosaurusbrachiosaurusbrontosaurusceratosauruscompsognathusdimetrodondiplodocusdolichosaurusdromiosauruselasmosaurushadrosaurusichthyosaurusmegalosaurusmosasaurusoviraptorplesiosauruspteranodonprotoceratopsstegodonstegosaurustheropodtitanosaurustrachodontriceratopstyrannosaurusvelociraptor
What dinosaurs eat plats and other dinosaurs?
many types of dinosaurs eat all sorts of plats. Especially TIGERS!!!
What types of dinosours are there?
The main types of dinosaurs were Theropoda, Sauropoda, Ornithopoda (such as hadrosaurs), Marginocephalia (ceratopsians and pachycephalosaurs), and Thyreophora (stegosaurs and ankylosaurs). The first two were lizard hipped, and the rest were bird hipped.
Are the Dinosaurs covered with spines?
Some dinosaurs did have spines but most did not. The main body coverings of most dinosaurs were scales and feathers.
