Pseudochirulus mayeri is a very small species, with the males being slightly smaller than the females. The average female weight is 154.5 grams, ranging from 105 to 206 grams, while the average length is 372 mm with a range of 330–400 mm. The male weighs approximately 149 grams ranging between 115 and 178 grams and an average length of 344 mm with a range of 318–369 mm. Their life expectancy in the wild is approximately 4 or 5 years. These specific pygmy ringtails have "cinnamon brown to dark brown" fur with a visible "bluish-gray undercoat" when they move. Their tail has thick brown hair on top while calloused and hairless underneath. The
Pseudochirulus mayeri also have "an opposable first toe on their hind feet, and their second and third toes are
syndactylus." These possums make dreys, or nests, "in the forks of trees, less than four meters off the ground." These nests consist of foliage similar to moss and lichen and they enter into "state[s] of partial
torpor" during the day. Therefore, they "are
nocturnal, solitary, arboreal herbivores" that do not travel far at night from their drey because they are small and slow moving.
P. mayeri can use sound to communicate. For example, young
P. mayeri "use a twitter-like call when in search [for] their mother and make a screeching noise as an alarm call." However, they mainly communicate with one another through their
olfactory. For example, males produce a
pheromone in the sternal gland that "[deter]s other males" while both females and males "establish home ranges" or "display reproductive status [using] feces and pheromones." ==Predators==