Key to Tetramorium semilaeve complex workers

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This worker key is based on: Salata, S. and L. Borowiec. 2017. Species of Tetramorium semilaeve complex from Balkans and western Turkey, with description of two new species of (Hymenoptera: Formicidae: Myrmicinae). Annales Zoologici (Warsaw). 62:279–313. (DOI:10.3161/00034541ANZ2017.67.2.008).

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Tetramorium

1

  • In nest sample all workers yellowish-brown to black . . . . . 2
  • In nest sample workers paler, yellow to pale yellowish-brown . . . . . 4

2

return to couplet #1

Tetramorium atlante casent0915045 h 1 high.jpg
Tetramorium atlante casent0915045 p 1 high.jpg

3

return to couplet #2

  • Body colouration dark brown to black; propodeal spines large and placed closer to the top of mesosoma . . . . . Tetramorium hippocratis
Tetramorium hippocratis casent0904822 h 1 high.jpg
Tetramorium hippocratis casent0904822 p 1 high.jpg
  • Body colouration yellowish brown to brown; propodeal spines small and placed lower . . . . . Tetramorium kephalosi
Tetramorium kephalosi F30.jpg
Tetramorium kephalosi F29.jpg

4

return to couplet #1

  • Head striated on almost whole surface, also in postocular area, only between frontal rugose area and rugosities along ocular area on each side with small area of diffused rugosities . . . . . Tetramorium bellerophoni
Tetramorium bellerophoni F17.jpg
Tetramorium bellerophoni F16.jpg
  • Head sculpture partly reduced, at least with postocular area and sides of frons without distinct striation but with at least half of the surface of the anterior part of head striate . . . . . 5

5

return to couplet #4

  • Occipital margin of head straight or very shallowly concave; propodeal spines spiniform; Western Mediterranean species . . . . . Tetramorium semilaeve
Tetramorium semilaeve casent0008637 h 1 high.jpg
Tetramorium semilaeve casent0008637 p 1 high.jpg
  • Occipital margin of head always concave; propodeal spines triangular; Eastern Mediterranean species . . . . . Tetramorium galaticum
Tetramorium galaticum F5.jpg
Tetramorium galaticum F2.jpg