Smallest organisms 4.4 cm (1.7 in). The smallest member of the order Carnivora is the least weasel ("Mustela nivalis"), with an average body length of 114–260 mm (4.5-10.2 in). It weighs between 29.5 – 250 grams with females being lighter. The smallest marsupial is the Long-tailed planigale from Australia. It has a body length of (including tail) and weigh on average. The Pilbara ningaui is considered to be of similar size and weight. The smallest member of the primate order is Madame Berthe's mouse lemur ("Microcebus berthae"), found in Madagascar, with an average body length of 92 mm (3.6 in). The smallest
Smallest organisms were first described in 1996 by Philippa Uwins of the University of Queensland. Smallest organisms The smallest organisms found on Earth can be determined according to various aspects of organism size; including volume, mass, height, length, or genome size. Given the incomplete nature of scientific knowledge, it is possible that the smallest organism is undiscovered. Furthermore, there is some debate over the definition of life, and what entities qualify as organisms; consequently the smallest known organism (microorganism) is debatable. Many biologists consider viruses to be non-living because they lack a cellular structure and cannot metabolize by themselves, requiring a host