Temporal range: 318–0 mya Upper Carboniferous – Recent
|The giant griffinfly Meganeura monyi lived some 300 million years ago. It was as large as a crow.|
The dragonflies and damselflies are the only living members of this group. It was was far more diverse in the late Paleozoic and contained gigantic species, including the griffinflies (or "giant dragonflies") of the order Protodonata. This lineage dates back at least to the Pennsylvanian, not quite 320 million years ago. 
References[change | change source]
- Trueman, John W.H. & Rowe, Richard J. 2008: 'Tree of Life Web Project' – Odonata. Dragonflies and damselflies.