Key to Malagasy Crematogaster Orthocrema queens

This worker key is based on: Blaimer, B.B. 2012. Taxonomy and species-groups of the subgenus Crematogaster (Orthocrema) in the Malagasy region (Hymenoptera, Formicidae). ZooKeys, 199, 23-70. doi:10.3897/zookeys.199.2631

Queens of Crematogaster telolafy are not known.

You may also be interested in

• Crematogaster
• Orthocrema subgenus page
• Key to Malagasy Crematogaster Orthocrema workers
• Ants of Madagascar

1

• Propodeal spines present . . . . . 2

• Propodeal spines absent . . . . . 3

2

return to couplet #1

• Body size smaller (HW 0.89–1.03,WL 1.28–1.53); propodeal spines longer (SPI 0.04–0.14); clypeus lacking median notch (Figure 19); antennal scapes usually surpassing posterior margin of head . . . . Crematogaster madecassa

• Body size larger (HW 1.10, WL 1.74); propodeal spines reduced to minute dents (SPI 0.02); clypeus with a median notch (Figure 20); antennal scapes just reaching posterior margin of head. . . . . . Crematogaster razana

Blaimer 2012 Orthocrema. Figures 19-23.

3

return to couplet #1

• Body size very small (HW 0.80–0.89, WL 1.50–1.63); eyes large (OI 0.30–0.34) . . . . . Crematogaster rasoherinae

• Body size large (HW 1.48–1.72, WL 2.61–2.70); eyes medium-sized (OI 0.23–0.27) . . . . . 4

4

return to couplet #3

• Head wider than long (CI 1.08); occipital carinae well pronounced (Figure 22); scuto-scutellar suture broadly meeting mesoscutum (Figure 21); dorsal face of propodeum short . . . . . Crematogaster volamena

• Head longer than wide (CI 0.96); occipital carinae indistinct; scuto-scutellar suture acutely meeting mesoscutum (Figure 23); dorsal face of propodeum about as long as posterior face . . . . . Crematogaster mpanjono