Koalas of Long Ago
Archaeological evidence shows Aboriginal peoples
It is likely that Aboriginal people lived alongside the giant koala (Phascolarctos stirtoni), which died out about 50,000 years ago. This species was about one-third larger than koalas today.
Fossil evidence of more ancient relatives of the koala are found throughout eastern Australia.
The Riversleigh Rainforest koala (Nimiokoala greystanesi) was smaller than the koalas of today and lived in Riversleigh in central Queensland up to 23 million years ago. Several species of litokoalas occupied the same area around 10 to 15 million years ago. Other extinct relatives of the modern koala include invictokoala, madakoala, koobor, perikoala and priscakoala.