The Dinosaurs and Prehistoric Animals of Nebraska

The Dinosaurs and Prehistoric Animals of Nebraska

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01of 08

Which Dinosaurs and Prehistoric Animals Lived in Nebraska?

Teleoceras, a prehistoric rhino of Nebraska. Wikimedia Commons

Somewhat surprisingly, given its proximity to dinosaur-rich Utah and South Dakota, no dinosaurs have ever been discovered in Nebraska--though there's no doubt that hadrosaurs, raptors and tyrannosaurs roamed this state during the later Mesozoic Era. Making up for this shortfall, though, Nebraska is famous for the diversity of its mammalian life during the Cenozoic Era, after the dinosaurs went extinct, as you can learn about by perusing the following slides. (See a list of dinosaurs and prehistoric animals discovered in each U.S. state.)

02of 08

Prehistoric Camels

Aepycamelus, a prehistoric camel of Nebraska. Heinrich Harder

Believe it or not, until a few million years ago, camels plodded across the northern plains of North America. More of these ancient ungulates have been discovered in Nebraska than in any other state: Aepycamelus, Procamelus and Protolabis in the northeast, and Stenomylus in the northwest. A few of these ancestral camels managed to migrate down to South America, but most wound up in Eurasia (via the Bering land bridge), progenitors of the modern camels of Arabia and central Asia.

03of 08

Prehistoric Horses

Miohippus, a prehistoric horse of Nebraska. Wikimedia Commons

The vast, flat, grassy plains of Miocene Nebraska were the perfect environment for the first, pint-sized, multiple-toed prehistoric horses. Specimens of Miohippus, Pliohippus, and less well-known "hippi" like Cormohipparion and Neohipparion have all been discovered in this state, and were likely preyed on by the prehistoric dogs described in the next slide. Like camels, horses had disappeared from North America by the end of the Pleistocene epoch, only to be reintroduced in historical times by European settlers.

04of 08

Prehistoric Dogs

Amphicyon, a prehistoric dog of Nebraska. Sergio Perez

Cenozoic Nebraska was as rich in ancestral dogs as it was in prehistoric horses and camels. The distant canine ancestors Aelurodon, Cynarctus and Leptocyon have all been discovered in this state, as have the remains of Amphicyon, better known as the Bear Dog, which looked (you guessed it) like a small bear with the head of a dog. Once again, though, it was up to the early humans of late Pleistocene Eurasia to domesticate the Grey Wolf, from which all modern North American dogs are descended.

05of 08

Prehistoric Rhinos

Menoceras, a prehistoric rhino of Nebraska. Wikimedia Commons

Weird-looking rhinoceros ancestors coexisted alongside the prehistoric dogs and camels of Miocene Nebraska. Two notable genera native to this state were Menoceras and Teleoceras; a slightly more distant forebear was the bizarre Moropus, a "stupid-footed" megafauna mammal closely related to the even bigger Chalicotherium. (And after reading the previous slides, would it surprise you to learn that rhinos went extinct in North America even as they prospered in Eurasia?)

06of 08

Mammoths and Mastodons

The Columbian Mammoth, a prehistoric mammal of Nebraska. Wikimedia Commons

More Mammoth remains have been discovered in Nebraska than in any other state--not only the Woolly Mammoth (Mammuthus primigenius), but also the lesser-known Columbian Mammoth and Imperial Mammoth (Mammuthus columbi and Mammuthus imperator). Unsurprisingly, this large, lumbering, prehistoric elephant is Nebraska's official state fossil, notwithstanding the prevalence, in lesser numbers, of another notable ancestral proboscid, the American Mastodon.

07of 08


Daeodon, a prehistoric mammal of Nebraska. Wikimedia Commons

Formerly known by the more evocative name Dinohyus--Greek for "terrible pig"--the 12-foot-long, one-ton Daeodon resembled a hippopotamus more than it did a modern porker. Like most of Nebraska's fossil mammals, Daeodon prospered during the Miocene epoch, from about 23 to 5 million years ago. And like virtually all of Nebraska's mammalian megafauna, Daeodon and other ancestral pigs eventually vanished from North America, only to be reintroduced thousands of years later by European settlers.

08of 08


Palaeocastor, a prehistoric mammal of Nebraska. Nobu Tamura

One of the strangest mammals ever to be discovered in Nebraska, Palaeocastor was a prehistoric beaver that didn't build dams--rather, this tiny, furry animal burrowed seven or eight feet into the ground using its oversized front teeth. The preserved results are known across the American west as "devil's corkscrews," and were a mystery to naturalists (some thought they were created by insects or plants) until a fossilized Palaeocastor was found nestled inside one specimen!


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