The Meganeura is ancient dragonfly from the Carboniferous era about 300 million years ago. It had a wing span of more than 75cm and probably was the largest insect ever appeared on earth. These insects were predatory and fed on the lizards , amphibians and other insects.It was discvered from the Stephanian Coal Measures of Commentry in France in 1880. Later, in 1885, the French paleantologist Brongniart described the fossil and named it Meganeura monyi. The holotype of the species is housed in Muséum National d’Histoire Naturelle , Paris.