Invictokoala

Invictokoala is an extinct genus of phascolarctid from middle Pleistocene-aged cave deposits at Mount Etna of central-eastern Queensland, Australia. Due to its incomplete nature, the relationships of this koala are difficult to establish, although it might represent a holdover from an Oligocene ancestor. The type and only known species is Invictokoala monticola.

==Discovery and naming== The fossil remains of Invictokoala were discovered during cave excavations at the Mount Etna Caves National Park in central-eastern Queensland. The type locality, described as Speaking Tube Cave, has a maximum age of 326 ± 22 ka and a minimum age no younger than ~205 ka. The holotype and only known specimen, QM F52796, is a fragment of the maxilla with two molars. The presence of an alveoli for the fourth molar, which is the last tooth to erupt in phascolarctids, and the lack of wear indicates the specimen belongs to a young adult. It was named and described by Gilbert J. Price and Scott A. Hocknull in 2011.