Gesomyrmex incertus is an extinct species of formicid in the ant subfamily Formicinae known from a fossil found in eastern Asia.

[1] The specimen was described from a compression fossil preserved in diatomite deposits of the Bol’shaya Svetlovodnaya site.

The fossil-bearing rocks preserve possibly Priabonian plants and animals which lived in and around a small lake near a volcano.

The fossil, an isolated head of a queen, was first described by the trio of paleomyrmecologists Gennady Dlussky, Alexandr Rasnitsyn, and Ksenia Perfilieva.

Gesomyrmex macrops is distinguished from G. intertus in that the queen has a much larger eye diameter to head length than either other species.