''Monomorium bidentatum'' 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 Myrmicinae. It is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...

to two South American countries,

Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a ...

and

Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...

Description

Workers are around long. The general color is dark brown, with the mandibles, antennae and legs slightly lighter. Females are almost long, but otherwise very similar to workers.

Distribution

''M. bidentatum'' is found in

and

. It was first described from Valdivia, Chile.

Taxonomy

The genus ''

Antichthonidris ''Monomorium'' is a genus of ants in the subfamily Myrmicinae. As of 2013 it contains about 396 species. It is distributed around the world, with many species native to the Old World tropics. It is considered to be "one of the more important grou ...

'' contained only two species, ''A. bidentata'' and '' A. denticulata''. Both species were originally described by

Gustav Mayr Gustav L. Mayr (12 October 1830 – 14 July 1908) was an Austrian entomologist and professor in Budapest and Vienna. He specialised in Hymenoptera, being particularly known for his studies of ants.Monomorium ''Monomorium'' is a genus of ants in the subfamily Myrmicinae. As of 2013 it contains about 396 species. It is distributed around the world, with many species native to the Old World tropics. It is considered to be "one of the more important gr ...

''. However, ''Antichthonidris'' was synonymized with ''Monomorium'' in 2001, so that this genus is no longer valid, and the two species are again known under their original name.

References

bidentatum Hymenoptera of South America Fauna of Chile Fauna of Argentina Insects described in 1887 Taxa named by Gustav Mayr Taxonomy articles created by Polbot Taxobox binomials not recognized by IUCN {{myrmicinae-stub