File:Blaimer 2012 Orthocrema 12-18.jpg

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

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