File:Hyracodon sp. (fossil mammal) (White River Formation, Oligocene; near Lusk, Wyoming, USA) (33567249596).jpg
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[edit]DescriptionHyracodon sp. (fossil mammal) (White River Formation, Oligocene; near Lusk, Wyoming, USA) (33567249596).jpg |
Hyracodon sp. - fossil mammal skull from the Oligocene of Wyoming, USA. (UW 15566, University of Wyoming Geological Museum, Laramie, Wyoming, USA) From museum signage: Hyracodon Leidy, 1856 Geologic Range: 39.5-29.0 million years ago (late Middle Eocene-early Late Oligocene) Geographic Range: Widespread in North America (Wyoming, Nebraska, South Dakota, North Dakota, Colorado, Montana, Utah, Texas, Saskatchewan, Mexico). Adult Size: Weight up to 758 pounds (344.0 kilograms). Habitat and Diet: Terrestrial. Browsing herbivore. Characteristics: This skull and lower jaw of Hyracodon (UW 15566) was collected from rocks of the White River Formation near Lusk, Wyoming. Specialists classify Hyracodon in the Family Hyracodontidae, which is grouped within the Rhinocerotoidea (rhinoceroses and close relatives differ from "true" rhinoceroses (Family Rhinocerotidae) in the structure of their legs and feet. The bones in the limbs of Hyracodon and its close relatives are elongated and slender, indicating that these rhinoceroses evolved for fast running, hence the informal name "running rhinoceroses". The bones in the limbs of "true" rhinoceroses are short and strongly built and the bones in the feet are compact. This shows that the limbs of "true" rhinoceroses evolved to support a heavy body and did not evolve for fast running. Fossils of the Hyracodontidae are also known in Asia. One Asian genus, Paraceratherium, is the largest known land mammal. Classification: Animalia, Chordata, Vertebrata, Mammalia, Placentalia, Perissodactyla, Hyracodontidae Locality: unrecorded/undisclosed site near the town of Lusk, eastern Wyoming, USA See info. at: <a href="https://en.wikipedia.org/wiki/Hyracodon" rel="nofollow">en.wikipedia.org/wiki/Hyracodon</a> |
Date | |
Source | Hyracodon sp. (fossil mammal) (White River Formation, Oligocene; near Lusk, Wyoming, USA) |
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@N05/33567249596 (archive). It was reviewed on 4 November 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
4 November 2019
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current | 14:37, 4 November 2019 | 2,234 × 1,340 (2.49 MB) | Ainz Ooal Gown (talk | contribs) | Transferred from Flickr via #flickr2commons |
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File change date and time | 12:12, 23 March 2017 |
Y and C positioning | Co-sited |
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Exif version | 2.21 |
Date and time of digitizing | 14:50, 7 July 2011 |
Meaning of each component |
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File source | Digital still camera |
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Date metadata was last modified | 08:12, 23 March 2017 |
Unique ID of original document | A622F839E53B513C9525D876AAFB7E3E |