Stigmatomma oregonensis queen in mate-calling posture, in a laboratory nest. She extrudes her sting to release pheromones. Quincy, California, USA
Stigmatomma oregonensis. Many of the most ancient lineages of ants show little size difference between queens and workers. Here, a queen sits atop a pile of brood in a laboratory nest; the other individuals are workers. Quincy, California, USA
This species has travelled around the world with human commerce. Archbold Biological Station, Florida, USA
