Date: 30/03/2015 05:51:02
From: mollwollfumble
ID: 700294
Subject: Diprotodon and Toxodon?

Is this a case of convergent evolution among the megafauna?

The diprotodon of Australia and toxodon of South America look remarkably similar to my untrained eye. The toxodon has recently been shown to be a Perissodactyl, a relative of the horse, tapir and rhinoceros. The diprotodon is basically a giant wombat.

Toxodon

Diprotodon

Reply Quote

Date: 30/03/2015 05:57:47
From: roughbarked
ID: 700295
Subject: re: Diprotodon and Toxodon?

Don’t know why but I can’t connect to that Toxodon image link.

Reply Quote

Date: 30/03/2015 06:22:12
From: roughbarked
ID: 700296
Subject: re: Diprotodon and Toxodon?

roughbarked said:


Don’t know why but I can’t connect to that Toxodon image link.

and I am having trouble connecting where Toxodon fits into this cladogram https://en.wikipedia.org/wiki/Metatheria

Reply Quote

Date: 30/03/2015 10:31:32
From: mollwollfumble
ID: 700375
Subject: re: Diprotodon and Toxodon?

roughbarked said:


roughbarked said:

Don’t know why but I can’t connect to that Toxodon image link.

and I am having trouble connecting where Toxodon fits into this cladogram https://en.wikipedia.org/wiki/Metatheria

That’s because its origins are brand new and based, interestingly, on the genetics not of DNA but of collagen.
http://www.abc.net.au/science/articles/2015/03/19/4200730.htm
Ever since Darwin first collected the fossils about 180 years ago, scientists had been baffled about where these odd South American beasts, that went extinct just 10,000 years ago, fit on the mammal family tree.

The mystery has now been solved. Researchers undertook a sophisticated biochemical analysis of bone collagen extracted from fossils of the two mammals, Toxodon and Macrauchenia, and demonstrated that they were related to the group that includes horses, tapirs and rhinos.

Their results are published today in the journal Nature. “We have resolved one of the last unresolved major problems in mammalian evolution: the origins of the South American native ungulates”.

Reply Quote

Date: 30/03/2015 14:38:23
From: SCIENCE
ID: 700666
Subject: re: Diprotodon and Toxodon?

convergent artistry, but what beyond being chunky four feet

Reply Quote