Trachymyrmex arizonensis & Pyramica arizonica.  The minute Pyramica arizonica (at center) is found only inside nests of another ant species, the fungus-growing ant Trachymyrmex arizonensis. 

Sycamore Canyon, Arizona, USA
Trachymyrmex arizonensis & Pyramica arizonica.  The minute Pyramica arizonica (at center) is found only inside nests of another ant species, the fungus-growing ant Trachymyrmex arizonensis. 

Sycamore Canyon, Arizona, USA
Trachymyrmex arizonensis foundress queen in her incipient fungus garden.  Notice the fine white hyphae of the mutualistic fungus as it grows over the substrate of vegetative debris she has provided for it.

Tucson, Arizona, USA
Trachymyrmex arizonensis foundress queen in her incipient fungus garden.  Notice the fine white hyphae of the mutualistic fungus as it grows over the substrate of vegetative debris she has provided for it.

Tucson, Arizona, USA
Trachymyrmex arizonensis & Pyramica arizonica.  The minute Pyramica arizonica (at center) is found only inside nests of another ant species, the fungus-growing ant Trachymyrmex arizonensis. 

Sycamore Canyon, Arizona, USA
Trachymyrmex arizonensis

Portal, Arizona, USA
Strumigenys arizonica

Sycamore Canyon, Arizona, USA
The minute Strumigenys arizonica is found only inside nests of another ant species, the much larger fungus-growing ant Trachymyrmex arizonensis.  These little ants are thought to prey on springtails that also live in the fungus gardens.

Sycamore Canyon, Arizona, USA
The minute Strumigenys arizonica (at center) is found only inside nests of another ant species, the fungus-growing ant Trachymyrmex arizonensis.  These little ants are thought to prey on springtails that also live in the fungus gardens.

Sycamore Canyon, Arizona, USA
The minute Strumigenys arizonica is found only inside nests of another ant species, the much larger fungus-growing ant Trachymyrmex arizonensis. These little ants are thought to prey on springtails that also live in the fungus gardens.

Sycamore Canyon, Arizona, USA
The minute Strumigenys arizonica is found only inside nests of another ant species, the much larger fungus-growing ant Trachymyrmex arizonensis.  These little ants are thought to prey on springtails that also live in the fungus gardens.

Sycamore Canyon, Arizona, USA
The minute Strumigenys arizonica is found only inside nests of another ant species, the much larger fungus-growing ant Trachymyrmex arizonensis. These little ants are thought to prey on springtails that also live in the fungus gardens.

Sycamore Canyon, Arizona, USA
See photo in original gallery.
all images and text © Alex Wild 2001-2013