Joculusium muizoni (meaning Muizon’s little joke, after Palaeontologist Christian de Muizon and the fossil site Gag Site) was a very small carnivorous marsupial from the Middle Miocene (around 14 million years old) of Riversleigh, northwestern Queensland, Australia. Only a single lower jaw of this animal has been recovered so very little is known about its relationship to other animals, though it is likely to be related to animals such as quolls, Tasmanian Tigers and Tasmanian Devils.
Body size estimate
It weight approximately 132 grams.
Distribution and locality
Joculusium muizoni is known from the Riversleigh World Heritage Fossil Site in northwestern Queensland. It is found in the following sites:
Faunal Zone C (Middle Miocene) -Gag Site
It is found in Faunal Zone C. Faunal Zone C is considered to be a rainforest environment.
Feeding and Diet
Joculusium muizoni was probably a small carnivore feeding on small vertebrates and insects.
Joculusium muizoni is from a single lower jaw, QM F36442.
With so little known about this animal, it is difficult to say for sure what its closest relative is, but it was confidently placed within the order Dasyuromorphia, so it is related to animals such as quolls, tasmanian tigers and tasmanian devils.
- incertae sedis (unknown)
- Wroe, S. 2001. A new genus and species of dasyuromorphian from the Miocene of Riversleigh, northern Australia. Memoirs of the Australian Association of Palaeontologists 25, 53-59.