Examples of mandible with straight external margin in S. stenorhina (A CASENT0900840, photographed by Ryan Perry) and of mandible with curvilinear external margin in S. exilirhina (B MAC_S01_LLSA_sp.3, photographed by IBBL).

 
 
  Part of: Brassard F, Leong C-M, Chan H-H, Gue╠ünard B (2020) A new subterranean species and an updated checklist of Strumigenys (Hymenoptera, Formicidae) from Macao SAR, China, with a key to species of the Greater Bay Area. ZooKeys 970: 63-116. https://doi.org/10.3897/zookeys.970.54958