File:Allosaurus atrox theropod dinosaur (Morrison Formation, Upper Jurassic; Cleveland-Lloyd Quarry, northern Emery County, east-central Utah, USA) 4 (15188948970).jpg
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Allosaurus atrox (Marsh, 1878) theropod dinosaur (in a traditional, inaccurate pose) from the Jurassic of Utah, USA (public display, Cleveland Museum of Natural History, Cleveland, Ohio, USA). The most famous Jurassic-aged theropod is Allosaurus. It’s smaller than its Late Cretaceous relative Tyrannosaurus, but was still a top predator. The species Allosaurus atrox (Marsh, 1878) is well known from numerous individuals found in the Morrison Formation (Tithonian Stage, upper Upper Jurassic) at the famous Cleveland-Lloyd Quarry in Utah, USA. Allosaurus atrox is only known from the Late Jurassic of western America. Classification: Animalia, Chordata, Vertebrata, Dinosauria, Saurischia, Theropoda, Allosauridae Stratigraphy: Morrison Formation, Tithonian Stage, upper Upper Jurassic Locality: Cleveland-Lloyd Quarry, northern Emery County, east-central Utah, USA Theropod were small to large, bipedal dinosaurs. Almost all known members of the group were carnivorous (predators and/or scavengers). They represent the ancestral group to the birds, and some theropods are known to have had feathers. Some of the most well known dinosaurs to the general public are theropods, such as Tyrannosaurus, Allosaurus, and Spinosaurus. |
| Date | |
| Source | Allosaurus atrox theropod dinosaur (Morrison Formation, Upper Jurassic; Cleveland-Lloyd Quarry, northern Emery County, east-central Utah, USA) 4 |
| Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/15188948970 (archive). It was reviewed on 6 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:56, 6 December 2019 | | 1,564 × 2,892 (2.48 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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