Only members of the Gomphidae, Clubtail, family have widely separated eyed. All the other dragonfly families have eyes that come close or touch.
By looking at how the eyes touch it is possible to further narrow down which family that a specimen belongs to.
Are the eyes large and do they contact each other over a long margin ?
Do the eyes come in contact over a small to medium length margin ?
Do the eyes touch or come close to touching at a single point ?