Dorsoanterior face of mesobasitarsus, including its longitudinal slit-like sulcus.  
  Part of: Esteves FA, Fisher BL (2016) Taxonomic revision of Stigmatomma Roger (Hymenoptera: Formicidae) in the┬áMalagasy region. Biodiversity Data Journal 4: e8032. https://doi.org/10.3897/BDJ.4.e8032