I'm not certain why you shared this with me at this point on in our discussion, but I'm guessing that you are questioning the validity of hypotheses in general, and showing one that was later revised. Is that correct?Yes ~ assumptions have a bit of a reputation LOL...
***A widely held misconception is that dingoes arrived in Australia with Aborigines. In fact, Aboriginal people arrived in Australia 50,000 years ago while dingoes arrived just 5,000 years ago. Evidence for the "recent" arrival of the dingo came in 2004 from DNA analysis of dingoes published in the Proceedings of the National Academy of Sciences. A team of scientists analysed DNA from 211 dingoes from all over Australia, 676 dogs from other continents, 38 Eurasian wolves, and 19 pre-European archaeological dog samples from Polynesia. The analyses showed dingoes share a high proportion of their DNA with dogs from East Asia. Differences in the DNA between dingoes and East Asian dogs indicated the dingo arrived in Australia 5,000 years ago.
The scientists concluded that dingoes are descendents of domesticated dogs from East Asia. All Australian dingoes may have arisen from a small number of dogs, possibly just one male and one female, that arrived in Australia in a single event. The East Asian dog and hence the dingo (Canis lupus dingo) probably descended from the Indian Wolf (Canis lupus pallipes). Studies of dingo skeletons suggest they are very similar to Indian pariah dogs and wolves. Australian dingo skulls are between those of dogs and wolves. Dingoes appear to be somewhere between wolves and dogs. This makes it possible that dingoes are the descendants of one of man's early attempts to domesticate wolves.
The biology of Australia is a potent argument for evolution and natural selection. The marsupials there were cut off from the eutherian mammals when the Austalian continent separated from a larger land mass - Gondwana - some eighty to a hundred million years ago, and evolved independently. The adaptive radiation to fill the existing niches parallels something analogous that happened with the placental mammals.From http://txtwriter.com/backgrounders/evolution/... :it would be interesting to figure out how the dingoes got here, as it appears they came after the land separated, or why we have platypus's or why certain seeds only burst into life after a bushfire.
"In the best known case of convergent evolution, two major groups of mammals, marsupials and placentals, have evolved in a very similar way, even though the two lineages have been living independently on separate continents ... Marsupials in Australia resemble placental mammals in the rest of the world. They evolved in isolation after Australia separated from other continents."