Fossil history of horse, Biology

Evolution of Horse -

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

 

S.No

 

Fossil/Genus

 

Period

 

Character

1

Hyrocotherium or Eohippus/Dawn Horse

(40 cm)

N. America

Eocene

 

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.

2

Mesohippus

 

(60 cm)

Oligocene

 

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.

3

Merychippus / (Miohippus)

Ruminating horse

 

(100 em)

Miocene

 

25 million years

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

4

Pliohippus / Toes horse (120 cm)

Pliocene

10 million years

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

skin.

5

Equus

 

Modem horse

(150 cm)

Pleistocene

 

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







Related Discussions:- Fossil history of horse, Assignment Help, Ask Question on Fossil history of horse, Get Answer, Expert's Help, Fossil history of horse Discussions

Write discussion on Fossil history of horse
Your posts are moderated
Related Questions
a) Why is it significant that ions being transported across a cell membrane be shielded from the interior of the lipid bilayer? b) Why is photosynthesis referred to as

Explain about the Anti Obesity Drugs? The anti-obesity drugs can be classified into two broad groups as indicated in the Figure. Drugs must be taken only under Doctor's

Q. Describe Consciousness as the waking state? Consciousness as the waking state: consciousness is also referred to as the waking state as opposed for example to sleep. All

Early campaigns of the 19th century that focused on sanitation, hygiene, housing, and nutrition had little effect in controlling communicable disease due to flawed rationale based

Water Relations in Terrestrial Environment Insects are the largest group of metazoans which have most successfully invaded the terrestrial environment. In addition, most arach

Absence of vesicular glands In some bulls the vesicular glands are either absent or hypoplastic also sometimes accompanied by poorly developed ampullae. A characteristic sympt

VI T AMINS   Made up of protein or fat. Vitamins required in minute quantity for normal metabolism and body functions. Vitamins are supposed to be vital amines

Explain Cardiac Muscle or heart muscle? Cardiac muscle, or heart muscle, is a striated muscle that occurs only in the vertebrate heart. The heartbeat is controlled by noncontr

Define some Precautions for Estimation of the Amount of Bacteria? 1. Dilution should be made carefully. 2. Use fresh sterile pipette for making each dilution. 3. Aseptic

Alcohol Related Emergencies: Alcohol is one of  the most serious health problems. Alcoholism is defined as a primary or chronic disease with genetic, psychological and environ