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When was the Eocene period?
50 million years ago
What species was alive during the eocene period?
Eohippus or "dawn" horse
How big was the eohippus?
- 15" tall
- about the size of a dog
- roached back
What kind of teeth did the eohippus have?
What kind of toes does the eohippus have?
- front: 4 functional, 1 splint
- back: 3 functional, 1 splint
What kind of habitat did the eohippus live in?
What kind of teeth does a brachyodant have?
- low-crowned teeth
- long and narrow jaw
What species was alive during the oligocene period?
When was the oligocene period?
35 million years ago
What was the mesohippus body structure like?
- more upright in forelegs
- slightly taller
What kind of habitat did the mesohippus live in?
What kind of toes does the mesohippus have?
- 3 functional front and hind
- 1 splint on front
What kind of teeth does the mesohippus have?
When was the miocene period?
15 million years ago
What species lived in the miocene period?
What was the merychippus body structure like?
- taller, more upright
- longer legs
- burro size 14 hands
What kind of habitat did the merychippus live in?
What kind of toes did the merychippus have?
3 toes; 1 weight-bearing, 2 non
What kind of teeth did the merychippus have?
What kind of teeth do hypsodants have?
high-crowned teeth, continually erupt
When was the pliohippus period?
18 million years ago
What was the pliohippus like?
- about 40inches in height
- non-functional bones turn into splint bones
What kind of habitat did the pliohippus live in?
What kind of toes did the pliohippus have?
1st true one-toed horse
What kind of teeth did the pliohippus have?
When did the Equus exist?
12,000 years ago to present
What kind of characteristics are unique to donkeys?
- long ears
- long standing heat
- switch for tail
- no forelock
- narrow feet
What is special about the Przewalski horse?
- last remaining "wild horse"
- erect mane
- thick hoof structure
- dun factor
- 66 chromosomes
- native to Mongolia
What class are one-toed ungulates in?
What animals are in the Perissodactyla class?
- rhino: one functional toe
- tapir: similar to dawn horse