How many species existing now would have been in existence in “Gondwana” times?
It is almost certain that no species existing now would have been in existence in Gondwanan times. Species change all the time to adapt to their environment, leading to the creation of new species. Many of the same groups of animals and plants were around then, but they were ancestral forms, like the tree Nothophagus (Southern Beech), and Steropodon (an ancestral Platypus). Things back then would have looked similar to you if you walked through some parts, but others would have been very different in may ways.
