The ergot is a small callosity on the underside of the fetlock of a horse or other equine. Some equines have them on all four fetlocks; others have few or no detectable ergots. In horses, the ergot varies from very small to the size of a pea or bean, larger ergots occurring in horses with "feather" - long hairs on the lower legs. In some other equines, the ergot can be as much as 1.5 inches in diameter.[1]
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Evolution
Like the chestnut, the ergot is thought to be a vestige of some part of the ancestral foot of the multi-toed Equidae, the ergot corresponding to the sole pad of other extant members of Perissodactyla, such as the tapir and rhinoceros.[1] Unlike the chestnut, which in the same individual may be large on the forelegs and smaller or even absent on the hindlegs, the ergot is of roughly equal size on all four legs.[1]
See also
References
- ^ a b c William Ridgeway (1905). The origin and influence of the Thoroughbred horse. University Press. pp. 538. http://books.google.com/books?id=PuETAAAAYAAJ&pg=PA12&dq=ergot. chapter 2
External links
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