Anergates

Anergates atratulus
Conservation status
Vulnerable (IUCN 2.3)
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Family:	Formicidae
Subfamily:	Myrmicinae
Tribe:	Tetramoriini
Genus:	Anergates
Species:	A. atratulus
Binomial name
Anergates atratulus Forel, 1874

Anergates is a single-species genus of tetramorine Myrmicine ants. It is a worker-less obligate parasite to Tetramorium caespitum, the "lawn ant" or "pavement ant", and is thought to have evolved as an aberrant form of the genus Tetramorium.

Its distribution is local over Eurosiberia and eastern parts of North America, broadly following that of its hosts. It is present but local in southern parts of Great Britain, having first been discovered in the UK by H. St. J. K. Donisthorpe and W. C. Crawley on July 23, 1912 in the New Forest.

Since, unlike many other obligate social parasites, Anergates is never known to coexist with the host colony's fertile queen, every Anergates-Tetramorium colony is doomed to survive only the lifespan of the youngest Tetramorium workers. Thus, the parasitic queen has very limited scope for producing alates to secure the next generation, as this time span is often only 2–3 years or fewer. As a result, even within its well-established range, Anergates is very scarce, with only a tiny proportion of Tetramorium colonies playing host to this parasite.

Type species: Myrmica atratula Schenck, 1852.

The genus name combines the Greek of "to work" έργατης with the negative prefix α, on account of its parasitic nature.

Species

• Anergates atratulus (Schenck, 1852)

Anergates atratulus

See also

• List of parasitic ant species
• Tetramorium caespitum
• Strongylodus testaceus (another parasite of Tetramorium found in the UK)
• Horace Donisthorpe (myrmecologist who first recorded this species in Britain, and the first to make a detailed study of its habits)
• List of ant genera (alphabetical)

References

• Social Insects Specialist Group (1996). Anergates atratulus. 2006. IUCN Red List of Threatened Species. IUCN 2006. www.iucnredlist.org. Retrieved on 11 May 2006. Listed as Vulnerable (VU D2 v2.3)