oolacunta

noun1

1. •
   An extinct marsupial, the desert rat kangaroo (Caloprymnus campestris), that lived in a sand-ridge and gibber-plain habitat in south-western Queensland and north-eastern Australia.

   • The fabulous oolacunta, a rat kangaroo that is now extinct, streaked across the desert at speeds that made it seem to float above the ground. — 2007