Fossil history of horse, Biology

Evolution of Horse -

Credit to Prof. C. Marsh (1879) of Yale University for complete work.










Hyrocotherium or Eohippus/Dawn Horse

(40 cm)

N. America



60 million years

Fox/small dog size short head and neck, molars were short


The forefeet were with four complete fingers (2, 3, 4 and 5)


and one splint of first fingers and hindlimbs with three functional toes (2, 3, and 4) and 1 and 5 toes are splint.




(60 cm)



40 million years

Modem sheep size, forelimbs had three fingers and one splint of fifth finger and hindlimbs possessed three toes, but

the middle one was longer.


Merychippus / (Miohippus)

Ruminating horse


(100 em)



25 million years

Size of ass, longer neck, the middle finger and toe being longer then others and supported entire body length.


Pliohippus / Toes horse (120 cm)


10 million years

Size slightly large than ass, Each fore and hindlimbs had one complete finger and toe and two splints hidden beneath





Modem horse

(150 cm)



1 million years

Long head and neck, each fore and hind limbs has one finger and one toe and two splints.

578_evolution of horse.png

Posted Date: 10/8/2012 9:15:40 AM | Location : United States

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