The Alexandria false antechinus (Pseudantechinus mimulus), also known as the Carpentarian false antechinus or Carpentarian pseudantechinus, is a small carnivorous marsupial, found only in a number of small, isolated localities in northern Australia.

[4] The P. mimulus is classified as an endangered species due to the decline in habitat quality and extent as a result of fire, introduced predators, and mining.

[3] This species is endemic to Australia, found only in five localities: near Mount Isa in northwestern Queensland; Alexandria Station on the Barkly Tableland in the Northern Territory; and three small islands in the Sir Edward Pellew Group, in the north-east of the territory.

[3][2] The Alexandria false antechinus has a very limited distribution, which has resulted in its classification by the IUCN as endangered.

[4] While a lot of details about the species diet is unknown, it is believed that they eat mostly invertebrates as well as some small vertebrates.