File:Trigonias sp. (fossil rhinoceros) (Chadron Formation, Lower Oligocene; Weld County, Colorado, USA) 1 (33451854871).jpg

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Summary

Description

Trigonias sp. - fossil rhinoceros skeleton from the Oligocene of Colorado, USA. (public display, Nebraska State Museum of Natural History, Lincoln, Nebraska, USA)

From museum signage: "Trigonias appears to be ancestral to the true rhinoceroses. This form was the most common type of rhinoceros in what is now Nebraska and Colorado, 40 million years ago.

Although today rhinoceroses live only in the Old World tropics, there were numerous species living in the northern climates during the geologic past. Rhinoceroses became extinct in North America just prior to the Ice Age, approximately 1 million years ago."

Classification: Animalia, Chordata, Vertebrata, Mammalia, Placentalia, Perissodactyla, Rhinocerotidae

Stratigraphy: Chadron Formation, Lower Oligocene

Locality: unrecorded/undisclosed site in Weld County, northern Colorado, USA


See info. at:

<a href="https://en.wikipedia.org/wiki/Trigonias" rel="nofollow">en.wikipedia.org/wiki/Trigonias</a>
Date
Source Trigonias sp. (fossil rhinoceros) (Chadron Formation, Lower Oligocene; Weld County, Colorado, USA) 1
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@N05/33451854871. 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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17 July 2011

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Date/TimeThumbnailDimensionsUserComment
current14:36, 4 November 2019Thumbnail for version as of 14:36, 4 November 20192,346 × 1,418 (3.1 MB)Ainz Ooal GownTransferred from Flickr via #flickr2commons

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