Key to Afrotropical Tetramorium quadridentatum species group

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This worker key is based on Bolton (1980)[1]

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..... Tetramorium

[[|thumb|220px|Tetramorium ]] [[|thumb|255px]] [[|thumb|255px]]

1

  • With the mesosoma in profile, dorsum without standing hairs of any description ..... Tetramorium simulator
[[|thumb|220px|Tetramorium simulator]] [[|thumb|255px]] [[|thumb|255px]]
  • With the mesosoma in profile, dorsum with standing hairs that are longer than broad . . . . . 2

2

return to couplet #1

  • Dorsal (outer) surface of hind tibiae either with projecting erect to subdecumbent strong hairs or with erect to suberect fine short pubescence or with both . . . . . 3
  • Dorsal (outer) surface of hind tibiae without projecting erect hairs of any description and without elevated or standing pubescence, any pubescence present is decumbent to appresed and generally short . . . . . 4

3

return to couplet #2

  • Hairs projecting from dorsal (outer) surfaces of hind tibiae fine and extremely long, much longer than the maximum tibial width. All dorsal surfaces of head and body with abundant extremely long hairs, the longest on the mesosoma >0.50mm ..... Tetramorium magnificum
[[|thumb|220px|Tetramorium magnificum]] [[|thumb|255px]] [[|thumb|255px]]
  • Hairs projecting from dorsal (outer) surfaces of hind tibiae distinctly much shorter than the maximum tibial width. Hairs on head and body much shorter, the longest on the mesosoma <0.25 mm ..... Tetramorium longoi
[[|thumb|220px|Tetramorium longoi]] [[|thumb|255px]] [[|thumb|255px]]

4

return to couplet #2

  • Propodeal in profile armed with a pair of acute spines which are distinctly longer than their basal width and much longer than the metapleural lobes . . . . . 5
  • Propodeal in profile armed with a pair of short triangular teeth which at most are only about as long as their dasal width and which are at most equal in length than the metapleural lobes ..... Tetramorium unicum
[[|thumb|220px|Tetramorium unicum]] [[|thumb|255px]] [[|thumb|255px]]

5

return to couplet #4

  • Mandibles with three teeth followed by a series of 4 denticles. Dorsum of head between frontal carinae coarsely and irregularly rugose from clypeus to occiput, with abundant anastomoses and cross-meshes everywhere..... Tetramorium viticola
[[|thumb|220px|Tetramorium viticola]] [[|thumb|255px]] [[|thumb|255px]]
  • Mandibles with three teeth followed by a series of 6-7 denticles. Dorsum of head between frontal carinae with fairly regular longitudinal rugulae, without anastomoses or cross-meshes, except close to occiput, sometimes also absent here ..... Tetramorium quadridentatum
[[|thumb|220px|Tetramorium quadridentatum]] [[|thumb|255px]] [[|thumb|255px]]

References