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Skull diagram of the basal sauropodomorph Massospondylus, showing the main skull openings (fenestra), including the external naris, the antorbital fenestra, the orbit, the infratemporal fenestra (here: lateral temporal fenestra), the supratemporal fenestra, and the mandibular fenestra. antorbital fenestra
Regardless of the object's identity, it may have little relevance to dinosaurs' internal anatomy and metabolic rate. Both modern crocodilians and birds, the closest living relatives of dinosaurs, have four-chambered hearts, although modified in crocodilians, and so dinosaurs probably had them as well. However such hearts are not necessarily ...
tr This is a list of stratigraphic units from which dinosaur body fossils have been recovered. Although Dinosauria is a clade which includes modern birds, this article covers only Mesozoic stratigraphic units. Units listed are all either formation rank or higher (e.g. group).
The following outline is provided as an overview of and topical guide to dinosaurs: . Dinosaurs – diverse group of animals of the clade and superorder Dinosauria.They were the dominant terrestrial vertebrates for over 160 million years, from the late Triassic period (about in 1963) until the end of the Cretaceous (2000), when the Cretaceous–Paleogene extinction event led to the extinction ...
Allosaurus (/ ˌ æ l ə ˈ s ɔːr ə s /) [1] [2] is an extinct genus of large carnosaurian theropod dinosaur that lived 155 to 145 million years ago during the Late Jurassic period (Kimmeridgian to late Tithonian ages). The name "Allosaurus" means "different lizard", alluding to its unique (at the time of its discovery) concave vertebrae.
Dinosaurs are a diverse group of reptiles ... Labeled diagram of a typical archosaur ... Its anatomy indicated that it was an active predator that was likely warm ...
The latest dinosaur being mounted at the Natural History Museum in Los Angeles is not only a member of a new species — it's also the only one found on the planet whose bones are green, according ...
Scale diagram comparing Carnotaurus to a human Carnotaurus was a large but lightly built predator. [ 17 ] The only known individual was about 7.5–8 m (24.6–26.2 ft) in length, [ H ] [ I ] [ 19 ] making Carnotaurus one of the largest abelisaurids.