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Daeodon shoshonensis
Topic Started: Jan 8 2012, 07:31 PM (5,525 Views)
Taipan
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Daeodon shoshonensis

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Fossil range: Early Miocene

Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Family: Entelodontidae
Genus: Daeodon
Species: Daedon shoshonensis

Daeodon (formerly Dinohyus, "terrible hog"), one of the largest, if not the largest, entelodont artiodactyls, lived 25-18 million years ago in North America.

Daeodon lived during the lower Miocene of western North America about 18 million years ago. A part of the artiodactyl radiation that followed the rise of vast grasslands during this time. One location where numerous Daeodon's bones were found was at Agate Springs, in Sioux County Nebraska in the late19th Century. These were part of a massive bone bed, laid down in a stream deposit. This location points towards the probability that these animals died in some sort of natural calamity, most likely a drought. They may have crowded around the last pools in a drying river bed where they perished. The final result being their bones were eventually washed downstream and accumulated in a river bend where they are found today. Moropus is also found here.

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Physical Description
Daeodon was 3.6 m (12 ft) long, 2.1 m (7 ft) tall (at-shoulder), 1m long skull, 1000 kg mass, animal that strongly resembled a giant, monstrous pig or warthog, possessing huge jaws with prominent tusks and flaring cheekbones. At first glance the massive skull is very reminiscent of a primitive predatory animal such as a Creodont, with large canine tusks, sharp pre-molars and a long snout. But on closer examination the bunodont (low-crowned) teeth, show characteristics that point to an omnivorous way of life.

An enormous saggital crest ran along the top of the skull of Daeodon, and there was large surface area on the mandible for the attachment of robust jaw operating muscles helped Daeodon crush into nuts, roots, carcasses, or each other. The skulls of all Entelodonts sport bony flanges on the malar bones. and protuberances on the lower jaw. These protrusions probably served a sexual recognition or group hierarchy function.

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The limbs were surprisingly long and gracile and seem a little out of proportion with the heavily muscled body, but were obviously meant to propel Daeodon at a very respectable speed over good distances. The feet ended in two small-hoofed toes (didactyl ) which on the skeleton look a little small to hold up such a huge beast. Daeodon probably had large hoofs and plantar pads on the feet to absorb shock and stabilize the animal as it moved. Fossilized tracks of Daeodon have been found in ancient mud at Agate Springs.

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Diet
Meat in the form of carrion may have been a very important element of its diet. Bones of Moropus have been found with tooth marks that match the teeth of Daeodon very well. It was unlikely that Daeodon was an active hunter. Perhaps it ambushed the very young of the camel Oxydactylus or the rhino Menoceros when the parents' guard was down. But an animal as huge and odiferous as Daeodon must have been, probably did not make a living as a stealthy killer.

Intraspecific Conflict
The physical damage found on many of the Daeodon bones, including many punctures and scrapes on the skull, seems to indicate that Daeodon probably fought amongst themselves during mating rituals, or over territory, or perhaps carcass rights.

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Taipan
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tomegatherion
 
http://blogs.scientificamerican.com/tetrapod-zoology/2011/08/25/entelodonts-giant-killer-pigs/

Interesting blog entry by Darren Naish.
Entelodonts were actually Cetancodontamorpha, not pigs and they were cursorial.
One could better describe them as dog-hippos or land-orcas!


Also check out this reconstruction by Roman Uchytel (taken from his page prehistoric-fauna.com):

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Edited by Taipan, May 11 2013, 05:48 PM.
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Mack
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Heterotrophic Organism
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A documentary from Prehistoric Predators, named Killer Pig (though entelodonts weren´t relatedd to Suids, they were much more closer relatedd to hippos and even the cetaceans), which is also about Daeodon (Dinohyus in the documentary) aswell





Edited by Mack, Jan 14 2012, 12:14 AM.
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ShadowPredator
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This is the most but ugly thing I've ever seen
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