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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.
Images Al-x Arkhane [153] [154] Brussels Museum of Natural Sciences: Allosaurus sp. nov. Late Jurassic: Possible new species Arkhane: Big Al MOR 693 Museum of the Rockies: Allosaurus jimmadseni: Kimmeridgian: Morrison Formation: Almost complete specimen with multiple pathologies. Big Al: Big Al 2 SMA 0005 Saurier Museum: Allosaurus jimmadseni ...
In 2024, re-examinations of the specimens attributed to Saurophaganax suggested that it is a chimera of multiple dinosaur genera, since some specimens most likely belong to a diplodocid sauropod, while the other referred allosaurid specimens belong to a novel species of Allosaurus, named as Allosaurus anax. [9]
Specimen NMV P150070, known as "Allosaurus robustus" "Allosaurus robustus" is an informal name used for specimen "NMV P150070", a theropod astragalus known from the Wonthaggi Formation (Early Cretaceous) of Victoria, Australia. [7] When first studied, it was thought to have belonged to a species of Allosaurus.
"Allosaurus robustus": Originally described as a new species of Allosaurus, but may actually represent a megaraptoran or abelisauroid. "Biscoveosaurus": Said to be a large ornithopod contemporary with Morrosaurus. Walgettosuchus woodwardi: It has been considered synonymous with Rapator, but too little is known of both genera to be certain.
Mounted skeletons of Tyrannosaurus (left) and Apatosaurus (right) at the AMNH. Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago, although the exact origin and timing of the evolution of dinosaurs is the subject of active research.
2. Acorn Woodpecker. These birds get their name from their unique habit of storing acorns in trees, which they use as a food source. Sometimes, they can store tens of thousands of them.
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 ...