Hayoceros
| Hayoceros Temporal range: Mid Pleistocene
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| Genus: | †Hayoceros Skinner, 1942
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Hayoceros is an extinct pronghorn from Nebraska.
It was 1.80 (6 ft) long and had four horns, arranged in two pairs. The first pair was forked and located above the eyes, the second was longer, located on the back of the skull and not forked. Most likely, males used these to fight in a fashion similar to modern pronghorns, locking horns and then pushing until the opponent gives in.
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