Key to the Dolichoderus thoracicus species-group in Thailand

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Key to the Dolichoderus thoracicus species-group in Thailand, based on Barabag & Jaitrong (2022).

1

  • Head densely and finely rugulose or punctured; dorsa of head, mesosoma, and gaster with dense pubescence and standing hairs; larger species (HW ˃ 0.90 mm) => 2
  • Head superficially reticulate or smooth and shiny; dorsa of head, mesosoma, and gaster with sparse pubescence and standing hairs; smaller species (HW ˂ 0.80 mm) => 3

2

return to couplet #1

3

return to couplet #1

  • Mesosoma foveolate => 4
  • Mesosoma punctured, not foveolate => 5

4

return to couplet #3

  • Propodeal junction sharply angulated; dorsal outline of propodeum straight; pronotum flat => Dolichoderus butteli
  • Propodeal junction bluntly angulated; dorsal outline of propodeum convex; pronotum convex => Dolichoderus brevis

5

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  • Larger species (TL 3.14–3.63 mm, HL 0.73–0.79 mm, HW 0.6–0.76 mm); head slightly longer than broad; body entirely yellowish-brown; dorsal outline of propodeum weakly convex; lateral face of pronotum relatively smooth with more developed of frontal carinae => Dolichoderus bakhtiari
  • Smaller in size (TL 2.51–2.93 mm, HL 0.66–0.69 mm, HW 0.49–0.52 mm); head slightly shorter than broad; vertex of head and gaster dark brown; dorsal outline of propodeum straight; lateral face of pronotum punctate with less developed of frontal carinae => Dolichoderus taprobanae

References