 They are red-legged mouse like marsupials that weigh anywhere between 67 and 95 g. There is no recognizable sexual dimorphism between the males and females, though the males are slightly larger than the females.The distinctive feature of the "M. brevicaudata" is the short, dense, grey or black fur they on their dorsal side with red fur on the lateral side that continues down to the feet.They are found in the rainforest, typically in mature, secondary rainforest.