About Petalura ingentissima Tillyard, 1908
Petalura ingentissima, commonly called the giant petaltail, has been described as the world's largest dragonfly, reaching a wingspan of 160 mm. This species is located in Queensland, Australia. Dr R.J. Tillyard first described the giant petaltail in 1908, and its specific scientific epithet ingentissima comes from the Latin adjective ingens, meaning "huge". It is one of five species belonging to the Australian genus Petalura. The giant petaltail is a large, heavily built dragonfly with a black body marked with some yellow patches. For female individuals, wingspan measures 158–162 mm and body length reaches 125 mm. It is the largest dragonfly species in overall body dimensions, though members of the genus Tetracanthagyna can have longer wings, and Chlorogomphus papilio can have a larger wing area. Its larvae measure 5.9 to 6.3 cm long, and are unusual for living in burrows along river margins, where they hunt passing prey.
