The Formicidae (Hymenoptera) of Fennoscandia and Denmark.
Author
Collingwood, C. A.
text
Fauna Entomologica Scandinavica
1979
8
1
174
http://antbase.org/ants/publications/6175/6175.pdf
journal article
6175
Genus
Tapinoma
Forster, 1850
Tapinoma
Foerster
, 1850:43.
Type-species:
Formica erratica Latreille
, 1798.
Workers monomorphic but size in some species variable. Antennae 12 segmented; palp formula 6, 4. Clypeus with front border truncate or incised. Petiole a small inconspicuous node overhung by the first gastral tergite. Queens as workers but with enlarged flattened alitrunk. Males have filiform thirteen segmented antennae with long scapes overreaching the occipital border. Head large relative to alitrunk. Genital armature with large prominent stipes.
This is a world-wide genus with most species found in the Indo-Australian and Ethiopian regions. There are several palaearctic species of which only one is indigenous north of latitude 50°. One or more of the smaller tropical species are cosmopolitan and sometimes establish in heated premises.
Figs. 20, 21.
Iridomyrmex humilis (Mayr)
. - 20: worker in profile; 21: male in profile. Scale: 1 mm.
Keys
to species of
Tapinoma
Queens and workers
1 Median portion of anterior margin of clypeus incised; colour evenly dark brown to black ............................................................................. 2.
erraticum (Latreille)
- Median portion of anterior margin of clypeus entire; bicoloured with dark head and promesonotum contrasting with pale gaster, propodeum and appendages
melanocephalum (Fabricius)
Males
1 Appendages and part of gaster very pale; length less than 2.5 mm
melanocephalum (Fabricius)
- Appendages and gaster unicolorous dark with rest of body; length 3.5 mm or greater............................................................................... 2.
erraticum (Latreille)