DISTRIBUTION-Formica obscuriventris

Agassiz Provincial Forest, Lake Minnewasta, Morden, Sandilands Provincial Forest, Spruce Woods Provinacial Park, Winnipeg
(Wheeler et al., 1989)


Key characteristics to the species of Formica rufa Group of Manitoba (Jeff Shaddock (unpublished) and adapted from Wheeler and Wheeler (1963))

1. Crest of petiole much thinner; in profile the anterior face slopes rearward to the crest even when the latter is blunt; gastric pubescence usually appressed and never reflected
2. Scapes usually without erect hairs, but if erect hairs are present then body hairs are not of uniform length
3. Petiolar scale seen from behind with the crest convex or angularly produced upward in the middle, the sides of the scale tapering inward from crest to peduncle
4. Clypeal fossae deep and pit like, the anterior edge of the clypeus, which bounds them in front, sweeping upward in an even curve to the median lobe; clypeus box-like
5. Middle and hind tibiae with many erect hairs on all surfaces

  • Photo Credit:Erin Prado © AntWeb 2002 - 2013
  • Photo Credit:Erin Prado © AntWeb 2002 - 2013

  • Taxonomic Classification

          Phylum: Arthropoda
          Subphylum: Hexapoda
               Class: Insecta
               Subclass: Pterygota
               Infraclass: Neoptera
                     Order: Hymenoptera
                     Suborder: Apocrita
                     Infraorder: Aculeata
                              Superfamily: Vespoidea
                              Family: Formicidae
                              Subfamily: Formicinae
                              Tribe: Formicini
                                 Genus: Formica
                                 Species: Formica obscuriventris

    Specific Biology

    Mesic brushy prairie, prairie-forest edge

    Source: Ant Web