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Genus: Harpagoxenus   Forel, 1893 

Classification:

Taxonomic History (provided by Barry Bolton, 2021)

Extant: 3 valid species, 1 valid subspecies

Harpagoxenus Forel, 1893b PDF: 167. AntCat AntWiki

Taxonomic history

Replacement name for Tomognathus Mayr, 1861; junior homonym of Tomognathus (Pisces) Agassiz, 1850: 376.
Harpagoxenus in Myrmicinae, Leptothoracini: Emery, 1914e PDF: 42; Forel, 1917 PDF: 245; Wheeler, 1922: 664; Emery, 1924f PDF: 265; all subsequent authors to the following.
Genus Harpagoxenus references
Mayr, 1863a PDF: 456 (catalogue); Mayr, 1865 PDF: 23 (diagnosis); Emery, 1882a: 279 (Europe & Algeria species); Dalla Torre, 1893 PDF: 63 (catalogue); Emery, 1924f PDF: 265 (diagnosis, catalogue); Creighton, 1950a PDF: 284 (North America species key); Bernard, 1967a PDF: 223 (diagnosis); Smith, 1979: 1398 (North America catalogue); Radchenko, 1994b: 112 (South Siberia species key); Bolton, 1995a PDF: 1049 (census); Bolton, 1995b: 211 (catalogue); Xu, 2012a PDF: 21 (all species key); Cantone, 2017 PDF: 202 (brief male diagnosis)
// Distribution

Distribution:

  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Canada, United States
    Asia: China, Georgia, Mongolia, Turkey
    Europe: Austria, Belarus, Belgium, Bulgaria, Czech Republic, Denmark, Estonia, Finland, France, Germany, Hungary, Italy, Lithuania, Norway, Poland, Romania, Russia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine
  Biogeographic regions (According to curated Bioregion/Taxon lists):
    Nearctic, Palearctic
  Native biogeographic regions (according to species list records):
    Nearctic, Palearctic

Taxonomic Treatment (provided by Plazi)

Treatment Citation: Collingwood, C. A., 1979, The Formicidae (Hymenoptera) of Fennoscandia and Denmark., Fauna Entomologica Scandinavica 8, pp. 1-174

Genus HarpagoxenusHNS Forel, 1893

HarpagoxenusHNS Forel, 1893: 167.

Type-species: Myrmica sublaevis NylanderHNS, 1849.

Workers and queens. Head large, subrectangular with broad edentate mandibles. Both petiole and postpetiole have strongly developed ventral tooth-like projections. Palp formula 5:3. Antennae 11 segmented.

Male. Similar to Leptothorax acervorumHNS but with ventral projecting tooth on postpetiole as in female castes. Antennae 12 segmented.

This genus contains at most 2 or 3 palaearctic and 1 North American species living in semi-parasitic dulotic relationship with members of the closely related genus LeptothoraxHNS



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