File:Triceratops sp. (Hell Creek Formation, Upper Cretaceous; Montana, USA).jpg
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Summary
| Description |
English: Triceratops sp. - ceratopsian dinosaur rib bone from the Cretaceous of Montana, USA.
Ceratopsians are the "horned dinosaurs". They were large, quadrupedal, herbivorous dinosaurs having a beaked skull and a frill - an extension of bone behind the skull that partially covered the neck. Ceratopsian dinosaurs are known from the Jurassic and Cretaceous. The last members of the group died out at the Cretaceous-Tertiary boundary, 65 million years ago. Seen here is an Triceratops rib bone from Montana's Hell Creek Formation of near-latest Cretaceous age. The ~vertical slices near the middle of the bone are theropod dinosaur teeth marks. Classification: Animalia, Chordata, Vertebrata, Reptilia, Archosauria, Dinosauria, Ornithischia, Marginocephalia, Ceratopsia, Ceratopsidae Stratigraphy: Hell Creek Formation, Maastrichtian Stage, Upper Cretaceous Locality: undisclosed locality in northeastern Montana, USA Info. at: en.wikipedia.org/wiki/Triceratops |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/52843473662/ |
| 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@N05/52843473662. It was reviewed on 25 April 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:40, 25 April 2023 |  | 3,847 × 1,003 (3.15 MB) | Ser Amantio di Nicolao | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52843473662/ with UploadWizard |