Gondwana became Australia, Antarctica and India

Jo Wittaker, Sydney University geophysicist says that the fossils of creatures in the sunken parts of Gondwana found off the coast of Australia show that the land was once part of the megacontinent and were not created by undersea volcanic activity. She called it

an exciting discovery which would hopefully shed light on how Gondwana broke into present-day Australia, Antarctica and India between 80 and 130 million years ago.
~ Parts of Gondwana megacontinent found off Australia

Since Australia is considered a remnant of the lost continent of Lemuria Mu, the discovery of these sunken parts of Gondwana could be undersea remnants of Lemuria Mu.