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Evolution of kangaroo
16
Transcript
Evolution of a kangaroo
By Clary Chen
30,000-18,000 years ago
25million-50,000 ago
The kangaroo
200 million ago
-----Procoptodon
-----Megazostrodon
-----Ekaltadeta
- Marsupial (carried in a pouch)
- The procoptodon was a full fledged hopper;
- The megazostrodon is commonly believed to be the first mammal on earth
- The Ekaltadeta, was an omnivorous marsupial;
- Identified by muscular tails, strong back legs, large feet, short fur and long, pointed ears
- It was a giant, standing 2m, and weighing 230kg;
- It was very rat like, but also a giant;
- Endemic to Australia
- It lived around 200million years ago, near the end of the age of the dinosaur.
- It moved fast, like a modern day kangaroo and had the same diet;
- It was a lot bigger then a modern kangaroo and a modern kangaroo was bigger then a nambaroo;
Habitat
Size
Diet
- Most live on the continent of Australia, though each species has a different place they prefer.
The largest kangaroo & the largest marsupial, is the red kangaroo.
- Near the leg, looked like an early form of the version modern kangaroo;
The smallest kangaroo is the musky rat-kangaroo.
- This creature was shrew/weasel like, and is widely considered the common ancestor for mammals.
- Kangaroos are herbivores.
- They eat grasses, flowers, leaves, ferns, moss and even insects.
- Like cows, kangaroos regurgitate their food and re-chew it before it is ready to be totally digested.
- One thing very different to the Kangaroo was it's toes and paw. It's toes resembled a horses hoof, and it's paws had 2 fingers and claws which was believed to have been used getting down branches from trees.
- It could have been the first kangaroo ancestor to be partially hopping, as the nambaroo wasn't.
25million-50,000 ago
200 million years ago
30,000-18,000 years ago
modern
50,000 years ago
50-25 millions ago
50,000 years ago
50-25 millions ago
-----Simosthenurus
-----Nambaroo
Convergent evolution
Sexual selection
A major characteristic about a Kangaroo, especially the male ones, is there sheer size.
It all has to do with sexual selection.
- The nambaroo was a meat eater, it was vicious and dangerous;
- The simosthenurus stood over 1.8m tall and weighed 118kg;
When the europeans came, they thought the Kangaroo was the Australian version of the dear.
- It walked on all fours;
- It was almost hopping like the way modern kangaroo's do, buts it's leg still needed more length and elasticity;
- It had canine teeth at the front;
- It is suspected to have opposable big toe.
- It had a similar diet as well, consisting of grass and shrubs, which was unlike the Ekaltadeta, since the Ekaltadeta was omnivorous.
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