The International Union for Conservation of Nature and Natural Resources red-lists a number of ant species. One species is Anergates atratulus (Schenck, 1852), a rarely collected social parasite introduced from Europe. The known distribution in North America is along the Atlantic seaboard. This note reports a huge range expansion in North America, to include Colorado. This finding is important because it provides useful information about the conservation and dispersal patterns of a rare, introduced, socially parasitic ant species.
Dash, Shawn T. and Sanchez, Leticia
"New distribution record for the social parasitic ant Anergates atratulus (Schenck, 1852) (Hymenoptera: Formicidae): an ICUN red-listed species,"
Western North American Naturalist: Vol. 69
, Article 19.
Available at: http://scholarsarchive.byu.edu/wnan/vol69/iss1/19