Gomphidae
| Authority | : | Rambur, 1842 |
| Nederlands | : | Rombouten |
| English | : | clubtail dragonflies |
| Deutsch | : | Flussjungfern |
| Ophiogomphus severus |
 |
| Yellowstone National Park (Wyoming), USA; 22 August 2017. Male. |
 |
| Marysvale (Utah), USA; 14 August 2017. Female. |