FIGURES 1–7. 1. Sphaeropthalma imperialis male, posterior portion of head in dorsal view; 2–4. S. marpesia: 2. male, posterior portion of head, dorsal view; 3. female mesosoma, dorsal view; 4. posterior portion of second metasomal tergite; 5. S. imperialis male, mandible, lateral view; 6. S. marpesia male, mandible, lateral view; 7. 5. S. megagnathos male, mandible, lateral view.
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Moser et al. (2016) studied this question.
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