Stereomyrmex is a genus of myrmicine ants. Two of the described species are known from only a single worker, making this one of the rarest groups of ants in the world.^[2]

Quick Facts Stereomyrmex, Scientific classification ...

Stereomyrmex
Stereomyrmex horni worker
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Family:	Formicidae
Subfamily:	Myrmicinae
Tribe:	Crematogastrini
Genus:	Stereomyrmex Emery, 1901
Type species
Stereomyrmex horni Emery, 1901
Diversity[1]
3 species
Synonyms
Willowsiella Wheeler, 1934

Close

The single specimen of S. anderseni was caught in a pitfall trap, and nothing is known about its biology.^{[citation needed]}

Stereomyrmex is probably the sister taxon to Romblonella. Closely related genera are Leptothorax and Cardiocondyla.^[3]

Stereomyrmex dispar is 3.2 mm long and black, with yellowish brown mandibles, antennae, legs and terminal segments of gaster. S. anderseni is only 2 mm long, has a very different petiolar and postpetiolar structure and is paler in color.^[3]

Stereomyrmex dispar has been described from a single worker, taken in 1933 on Bellona Island, Solomon Islands; no other specimen has since been found, and it is unlikely that the species is truly endemic to Bellona. S. anderseni is known from a single worker as well.^[3] S. horni was collected under rocks in Sri Lanka.^[4]

The genus was originally named in honor of Maurice Willows Jr., who collected the type specimen of S. dispar.^[5] S. anderseni was collected by A.N. Andersen. S. horni was collected by W. Horn.^{[citation needed]}

• Stereomyrmex anderseni (Taylor, 1991) — King Edward River, Western Australia
• Stereomyrmex dispar (Wheeler, 1934) — Bellona, Solomon Islands
• Stereomyrmex horni Emery, 1901 — Sri Lanka