Cryptids of Australia pt:1 & pt:2

[Bally002]

Britannica.com states:

 'Some 180 million years ago, in the Jurassic Period, the western half of Gondwana (Africa and South America) separated
from the eastern half (Madagascar, India, Australia, and Antarctica).'

Britannica.com also states:

'Human evolution, the process by which human beings developed on Earth from now-extinct primates.
Viewed zoologically, we humans are Homo sapiens, a culture-bearing upright-walking species that lives on the ground and very
likely first evolved in Africa about 315,000 years ago.

We are now the only living members of what many zoologists refer to as the human tribe, Hominini, but there is abundant fossil
evidence to indicate that we were preceded for millions of years by other hominins, such as Ardipithecus, Australopithecus, and
other species of Homo, and that our species also lived for a time contemporaneously with at least one other member of our genus,
H. neanderthalensis (the Neanderthals)....'

So if the Yowie exists, it had to have 'left Africa' before the Australia we know today had split from Gondwana -a piece of Pangaea.
This is a puzzle!

Before I release upon you "That one big monkey man" story from central Australia.  

While the continents split up I've read that ice ages and sea levels over 10's of 1000's of years enabled movement (land bridges) through Indonesia New Guinea to Cape York south to Tasmania until eventually the continent was cut off.  The only land based predators later were man of course, dingoes, predatory birds, reptiles etc so the larger mammals/marsupials survived.  Not withstanding there have recently been some monster dinosaur fossil discoveries in remote areas.

I would appreciate your thoughts on this.  

Yowies have been sighted across Australia and even in Tasmania but scarce evidence of such apart mostly from stories like "That one big monkey man".

Kind regards,

Bally :)