''Lasius alienus'', or cornfield ant, is a species of

ant Ants are eusocial insects of the family Formicidae and, along with the related wasps and bees, belong to the order Hymenoptera. Ants evolved from vespoid wasp ancestors in the Cretaceous period. More than 13,800 of an estimated total of ...

in the subfamily

Formicinae The Formicinae are a subfamily within the Formicidae containing ants of moderate evolutionary development. Formicines retain some primitive features, such as the presence of cocoons around pupae, the presence of ocelli in workers, and little ...

(family Formicidae). Workers have a length of about 2–4 mm, Queens are larger (7–9 mm).

Distribution

They live in

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a subcontinent of Eurasia and it is located entirel ...

, from

Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , i ...

to the

Caucasus The Caucasus () or Caucasia (), is a region between the Black Sea and the Caspian Sea, mainly comprising Armenia, Azerbaijan, Georgia (country), Georgia, and parts of Southern Russia. The Caucasus Mountains, including the Greater Caucasus range ...

; populations in North America are now considered to be a separate species, '' Lasius americanus''.

Genetics

Genome In the fields of molecular biology and genetics, a genome is all the genetic information of an organism. It consists of nucleotide sequences of DNA (or RNA in RNA viruses). The nuclear genome includes protein-coding genes and non-coding g ...

type ''Lasius alienus'': 0,31 m (C value)Tsutsui, ND, AV Suarez, J.C. Spagna, and J.S. Johnston (2008). The evolution of genome size in ants. BMC Evolutionary Biology 8: 64.

Mutualism

The butterfly ''

Plebejus argus The silver-studded blue (''Plebejus argus'') is a butterfly in the family Lycaenidae. It has bright blue wings rimmed in black with white edges and silver spots on its hindwings, lending it the name of the silver-studded blue. ''P. argus'' can be ...

'' lays eggs near nests of the ant ''L. alienus'', forming a mutualistic relationship. This mutualistic relationship benefits the adult butterfly by reducing the need for parental investment. Once the eggs hatch, the ants chaperone the larvae, averting the attacks of predatory organisms like wasps and spiders as well as parasites. In return, the ants receive a saccharine secretion fortified with amino acids from an eversible gland on the larvae's back. As first instar larvae prepare to pupate, the ants carry the larvae into their nests. Once the larvae become pupae, the ants continue to provide protection against predation and parasitism.

References

*Seifert, B. (1992). ''A taxonomic revision of the Palaearctic members of the ant subgenus Lasius s. str.'' (Hymenoptera: Formicidae). Abhand. Be. Naturkundemus. Goerlitz 66 (5): 1-66. *Wilson, E. O. (1955). ''A monographic revision of the ant genus Lasius'', Ph.D. dissert., Harvard University, 105 p.

External links

* alienus Hymenoptera of Europe Insects described in 1850 Taxa named by Thomas Ignatius Maria Forster {{formicinae-stub