English: Longirostromeryx - fossil saber-toothed deer skeleton (female) from the Miocene of Nebraska, USA.

This fossil deer skeleton was excavated from a volcanic ash deposit at Nebraska's Ashfall Fossil Beds. The ash was derived from the Bruneau-Jarbidge Volcanic Field in southwestern Idaho's Snake River Plain. The wind-blown ash buried a vertebrate-rich biota at what was originally a Miocene waterhole.

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From on-site signage:

This is one of more than a dozen skeletons of small saber-toothed deer found near the bottom of the Ashfall volcanic ash bed. These extinct animals, whose scientific name (Longirostromeryx) refers to their long, slender snouts, are related to the modern musk deer of eastern Asia. The males have elongated upper canine teeth. Durring the rutting season, males use the sabers to battle with each other. The females have small canine teeth, as in this skeleton. . . . Saber-toothed deer became extinct in North America approximately 10 million years ago, possibly because of climatic cooling and drying.

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Classification: Animalia, Chordata, Vertebrata, Mammalia, Artiodactyla, Moschidae

Stratigraphy: Cap Rock Member, Ash Hollow Formation, Ogallala Group, Miocene, 11.83 Ma

Locality: Ashfall Fossil Beds State Historical Park, northeastern Nebraska, USA

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Info. at:

en.wikipedia.org/wiki/Ashfall_Fossil_Beds