Dragonflies and their relatives are an ancient group. The oldest fossils, belonging to the Protodonata group, inhabited about 325 million years ago, and also retain traces in fossils from Upper Coalition in Europe, the largest group of insects ever inhabited. on Earth, with Meganeuropsis permiana from early Permian had a wingspan of 750 mm (30 in); Their fossil record ends with the Permian – Triassic extinction (c. 247 million years ago).
Protoanisoptera, another group of seniors that lacked certain tendon features of modern Odonata, lived from early Permian to late Permian until the end of the Permian period and is known for its fossilized wings. currently the regions of today the United States, Russia and Australia, suggest that they may have had global distribution. Modern Odonata precursors are grouped in a branch called the Panodonata, which includes the basic Zygoptera and Anisoptera (true dragonfly) .Today there are about 3,000 extant species of dragonflies in the world. gender.