Figures 12-18 from: Blaimer B (2012) Taxonomy and species-groups of the subgenus Crematogaster (Orthocrema) in the Malagasy region (Hymenoptera, Formicidae). ZooKeys 199: 23-70. https://doi.org/10.3897/zookeys.199.2631

Figures 12-18 - Species key to the workers of Malagasy Crematogaster (Orthocrema). 12 occipital carinae distinct (Crematogaster madecassa, CASENT0038498) 13 propodeum with lateral raised carinae (Crematogaster madecassa, CASENT0038498) 14 occipital carinae indistinct (Crematogaster volamena, CASENT0125748) 15 propodeum without lateral raised carinae (Crematogaster volamena, CASENT0125748) 16 clypeus with two median carinae (Crematogaster madecassa, CASENT0038498) 17 clypeus without median carinae (Crematogaster razana, CASENT1408782) 18 A  propodeal spines thin and acute B propodeal spines triangular C propodeal spines curved-triangular.