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Majungasaurus (/ m ə ˌ dʒ ʌ ŋ ɡ ə ˈ s ɔː r ə s /; lit. ' Mahajanga lizard ') is a genus of abelisaurid theropod dinosaur that lived in Madagascar from 70 to 66 million years ago, at the end of the Cretaceous Period, making it one of the last-known non-avian dinosaurs that went extinct during the Cretaceous–Paleogene extinction event.
Carnotaurus (/ ˌ k ɑːr n oʊ ˈ t ɔːr ə s /; lit. ' meat bull ') is a genus of theropod dinosaur that lived in South America during the Late Cretaceous period, probably sometime between 72 and 69 million years ago. The only species is Carnotaurus sastrei.
This is an accepted version of this page This is the latest accepted revision, reviewed on 20 February 2025. Extinct clade of dinosaurs Ceratosaurs Temporal range: Sinemurian - Maastrichtian, 199.3–66 Ma PreꞒ Ꞓ O S D C P T J K Pg N Six ceratosaurs (top left to bottom right): Rugops, Elaphrosaurus, Majungasaurus, Carnotaurus, Ceratosaurus, Berthasaura Scientific classification Domain ...
There are two principal types of bones: Dermal bone is directly formed in the dermis (skin), usually growing from initially thin plates. Among others, most bones forming the outer surface of the skull and lower jaws are dermal bones. In contrast, endochondral bone is formed from a cartilaginous precursor, which ossifies (turn into bone). [1 ...
Brachyrostra (meaning "short snouts") is a clade within the theropod dinosaur family Abelisauridae.It includes the famous genera Carnotaurus, Aucasaurus, potentially Abelisaurus as well as their close relatives from the Cretaceous Period of Argentina and Brazil plus Caletodraco from France. [1]
Carnosauria is an extinct group of carnivorous theropod dinosaurs that lived during the Jurassic and Cretaceous periods.. While Carnosauria was historically considered largely synonymous with Allosauroidea, some recent studies have revived Carnosauria as clade including both Allosauroidea and Megalosauroidea (which is sometimes recovered as paraphyletic with respect to Allosauroidea), and thus ...
Fibrolamellar bone is fairly common in young crocodilians and sometimes found in adults. [68] [69] Haversian bone has been found in turtles, crocodilians and tortoises, [70] but is often absent in small birds, bats, shrews and rodents. [69] Nevertheless, de Ricqlès persevered with studies of the bone structure of dinosaurs and archosaurs.
Data for the abelisaurid fore limbs are known from Eoabelisaurus and the carnotaurines Aucasaurus, Carnotaurus, and Majungasaurus. All had small fore limbs, which seem to have been vestigial. [11] The bones of the forearm (radius and ulna) were extremely short, only 25% of the length of the upper arm in Carnotaurus and 33% in Aucasaurus. The ...