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Horse Evolution

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Georgia Warburton

on 18 October 2012

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Transcript of Horse Evolution

By Georgia Warburton Horse Evolution 52 Mya - Ypresian
Ate soft foliage and fruit
Lived in marshy swamping areas - in North America and Western Europe Hyracotherium - Time & Environment Similar to the size of a fox - 250mm to 400mm in height
600mm in length
15kg - 16kg
Four-hoofed toes on the front feet & three hoofed toes on the back feet
Low crowned teeth Structure of the Hyracotherium Pliohippus - Time & Environment Reasons for Adaption Low crowned teeth indicate the the animal was a browser herbivore
The four toes front legs and three on the hind legs - prevented it from skidding
The small like figure - it would camouflage itself under undergrowth from predators Merychippus - Time & Environment Found in many locations throughout the US and Europe - mainly in US
17 - 11 million years ago during the Miocene time
Forest thinned and grass became more dominant
Swamp gave way to soft ground
Plants - Grass mostly Structure of a Merychippus High crowned teeth
3 toes on the front and 3 on the back
1 meter high at the shoulder
86kg on average Reasons for Adaption 1st grazing ancestor of a horse - Teeth, longer neck adapted to this - forest thinned, grass became prominent
Larger build - better at running from predators
Extra toes no longer needed- swamp gave way to soft ground Pliocine 12-2 million years ago
Plains of North America, South America, Asia, Africa and Europe Structure of the Pliohippus Two long extra toes, barely visible as calloused stubs
Almost two metres tall
High Crowned teeth Reason for Adaption Teeth stayed relatively the same - grazed on the plains
The side toes were continually disapearing - need to outrun its predators
The build is continually growing due to the instict of running from predators 1 2 3 4 5 6 7 8 9 10 11 12 13
Full transcript