Key to Colobostruma of the southwestern Australian Botanical Province

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This worker key is based on: Heterick, B. E. 2009a. A guide to the ants of South-western Australia. Records of the Western Australian Museum, Supplement 76: 1-206. Part 2 PDF

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1

  • In lateral view, mesosoma strongly arched, propodeum low in relation to petiole and postpetiole (Figure 535) . . . . . Colobostruma nancyae
Figure 535.
Colobostruma nancyae H casent0280689.jpg
Colobostruma nancyae P casent0280689.jpg
  • In lateral view, mesosoma at most weakly convex . . . . . 2

2

return to couplet #1

  • Lamellae absent from lateral face of postpetiole, expanded posteriad only (pale, depigmented species) (Figure 536) . . . . . Colobostruma cerornata
Figure 536.
Colobostruma cerornata H casent0900008.jpg
Colobostruma cerornata P casent0900008.jpg
  • Lamellae present on both lateral and posterior faces of postpetiole, expanded to form wing-like flanges (Figure 537) . . . . . 3
Figure 537.

3

return to couplet #2

  • Wing-like flange of postpetiole with translucent windows along both anterior and posterior margins, its anterior margin formed by band of thickened integument (Figure 538) . . . . . Colobostruma mellea
Figure 538.
Colobostruma mellea H casent0900006.jpg
Colobostruma mellea P casent0900006.jpg
  • Wing-like flange of postpetiole with a translucent window on its posterior margin only, its anterior margin formed by band of thickened integument (Figure 539) . . . . . 4
Figure 539.

4

return to couplet #3

Colobostruma elliotti H casent0280687.jpg
Colobostruma elliotti P casent0280687.jpg

5

return to couplet #4

  • Antennae gently elbowed, lacking ventral lobe, antennal diameter changing gradually along its length . . . . . Colobostruma australis
Colobostruma australis H casent0900010.jpg
Colobostruma australis P casent0900010.jpg
  • Antennae strongly elbowed, with ventral lobe, greatest diameter of antenna being across lobe . . . . . 6

6

return to couplet #5

  • In full-face view, ridges immediately in front of eyes nearly parallel or diverging posteriad (Figure 540) . . . . . Colobostruma papulata
Figure 540.
MCZ-31163 Colobostruma papulata holotype head.jpg
MCZ-31163 Colobostruma papulata holotype side.jpg
  • In full-face view, ridges immediately in front of eyes converging posteriad (Figure 541) . . . . . Colobostruma froggatti
Figure 541.
Colobostruma froggatti H casent0280688.jpg
Colobostruma froggatti P casent0280688.jpg