Australia (continent) of the continent of Australia, but of the separate, submerged continent of Zealandia. New Zealand and Australia are both part of the Oceanian sub-region known as Australasia, with New Guinea being in Melanesia. The term Oceania is often used to denote the region encompassing the Australian continent, Zealandia and various islands in the Pacific Ocean that are not included in the seven-continent model. Papua New Guinea, a country within the continent, is one of the most culturally and linguistically diverse countries in the world. It is also one of the most rural, as only 18 percent of its people live
Smallest organisms 0.46 mm. The smallest land snail is "Acmella nana". Discovered in Borneo, Malaysia, and described in November 2015, it measures only 0.7 mm. The previous record was that of "Angustopila dominikae" from China, which was reported in September 2015. This snail measures 0.86 mm. The smallest crustacean, and indeed the smallest arthropod, is the tantulocarid "Stygotantulus stocki", at a length of only . Eriophyid mites measure 125 to 250 μm in length. Adult males of the parasitic wasp "Dicopomorpha echmepterygis" can be as small as 139 μm long, smaller than some species of protozoa (single-cell creatures); females are 40% larger.