Monomorium Mayr

Ward, P. S., 2005, A synoptic review of the ants of California (Hymenoptera: Formicidae), Zootaxa 936, pp. 1-68: 14

publication ID

http://doi.org/ 10.5281/zenodo.171144

publication LSID

lsid:zoobank.org:pub:DEBCE6E9-17D9-43A3-814B-0C3431DEBF4A

persistent identifier

http://treatment.plazi.org/id/9E2AA724-FFDB-FFDB-FEBF-FAD6C65BFEE3

treatment provided by

Plazi

scientific name

Monomorium Mayr
status

 

Genus Monomorium Mayr 

Leaving aside introduced species, the Nearctic Monomorium  belong to the taxonomically vexing minimum  ­group, revised by DuBois in 1986. Several of the species recognized by DuBois (1986) are problematic, and parts of his keys to workers and queens are unusable. Here I deal only with the two taxa recorded from California: M. wheelerorum DuBois  is considered to be a junior synomym of M. ergatogyna Wheeler  (syn. nov.) because the putative differences between the two “species” cannot be verified. A key distinguishing feature is said to be the lateral profile of the scutum and scutellum of the queen: flat or slightly depressed in M. wheelerorum  and convex in M. ergatogyna  . In populations from northern California, however, this character shows continuous variation between these two conditions, even among queens from the same nest (the species is polygynous). Other supposed queen and worker differences disappear when intra­ and interpopulation variation are taken into account. A modern systematic treatment of the M. minimum  ­group is badly needed. Because the queens are apterous in most western populations, interpopulation differentiation is expected to be accentuated, a factor that needs to be considered in any taxonomic study.