Acanthostichus is a predatory and predominantly subterranean genus of ant in the subfamily Dorylinae. They are found in the New World, from the southern United States to Uruguay, Paraguay and northern Argentina. They are probably common, but due to their subterranean nature, they are seldom collected or seen.
Most species are very similar; the petiole is the most important feature in identifying species. Many are known only from a few collections, or even single specimen, which makes it hard to determine variability within species. For this reason, many described members of this genus may be synonyms.
Species The genus currently contains 24 species:
Acanthostichus arizonensis MacKay, 1996 Acanthostichus bentoni MacKay, 1996 Acanthostichus brevicornis Emery, 1894 Acanthostichus brevinodis MacKay, 1996 Acanthostichus concavinodis MacKay, 1996 Acanthostichus davisi (Smith, 1942) Acanthostichus emmae MacKay, 1996 Acanthostichus femoralis Kusnezov, 1962 Acanthostichus flexuosus MacKay, 1996 Acanthostichus fuscipennis Emery, 1895 †Acanthostichus hispaniolicus De Andrade, 1998 Acanthostichus kirbyi Emery, 1895 Acanthostichus laevigatus MacKay, 1996 Acanthostichus laticornis Forel, 1908 Acanthostichus lattkei MacKay, 1996 Acanthostichus longinodis Mackay, 2004 Acanthostichus punctiscapus MacKay, 1996 Acanthostichus quadratus Emery, 1895 Acanthostichus quirozi MacKay, 1996 Acanthostichus sanchezorum MacKay, 1985 Acanthostichus serratulus (Smith, 1858) Acanthostichus skwarrae Wheeler, 1934 Acanthostichus texanus Forel, 1904 Acanthostichus truncatus MacKay, 1996
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