Midleg, anterior face (CASENT0145426): close up of the mesobasitarsus, including its slit-like longitudinal 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