Iridictyon trebbaui is a species of broad-winged damselfly in the family Calopterygidae. It is found only on the tepuis of Venezuela and Guyana at elevations of above sea level.
Iridictyon trebbaui has a restricted range and is only known from a few locations. However, its range is protected by a number of protected areas (e.g., Canaima National Park) and there are no threats to its habitat.