Myrmecia (ant) encountered before. Based on five species, the median lethal dose (LD) is 0.18–0.35 mg/kg, making it among the most toxic venoms in the insect world. The toxicity of the venom may have evolved due to the intense predation by animals and birds during the day, since "Myrmecia" is primarily diurnal. In Tasmania, 2–3% of the human population is allergic to "M. pilosula" venom. In comparison, only 1.6% people are allergic to the venom of the western honeybee ("Apis mellifera"), and 0.6% to the venom of the European wasp ("Vespula germanica"). In a 2011 Australian ant-venom allergy study, the objective of
Green-head ant 1863 he moved the ant from "Rhytidoponera" to "Ectatomma". In 1897 Italian entomologist Carlo Emery named the ant "Rhytidoponera metallica" and in 1911 designated it as the type species of "Chalcoponera", a subgenus of "Rhytidoponera"; the ant was, however, mistakenly identified as the type species of "Rhytidoponera" by some scientists. The taxonomy of the green-head ant and other species related to it (forming the "R.metallica" species group) were a source of confusion due to the high geographic variations in the green-head ant and similar-looking species having been treated as forms (occurrence of multiple morphs). These forms have been described under