Australasian

Australasia +‎ -an

Australasian (not comparable)

1. Relating to Australia and its surrounding regions of New Guinea, Indonesia, and the south west Pacific Ocean.
   • 1992, Rudolf M[athias] Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, New York, N.Y.: Columbia University Press, →ISBN, page 4:

     Much more diffuse affinities occur to the Australasian monotypic Goebeliellaceae.

• Oceanian

Australasian (plural Australasians)

1. A native or inhabitant of Australasia.