M. australis may refer to: Malacosteus australis, the Southern stoplight loosejaw, a small, deep-sea dragonfish species Marsdenia australis, the bush banana, silky pear or green vine, a plant species native to Australia Megascolides australis, the giant gippsland earthworm, an earthworm species native to Australia Mentha australis, the river mint, native mint, native peppermint and Australian mint, a mint species native of eastern Australia Microcavia australis, the Southern mountain cavy, a rodent species found in Argentina, Bolivia and Chile Micromesistius australis, the southern blue whiting, a cod species found in the southern oceans Mirandia australis, a jumping spider species found in Paraguay Morus australis, the Chinese mulberry, a flowering plant species found in South-East Asia Myliobatis australis, the Australian bull ray or southern eagle ray, a large ray species of temperate waters of Australia Myrsine australis, the red matipo or mapou, a shrub species endemic to New Zealand
See also Australis (disambiguation)