Posterior portion of abdominal segment IV in profile (only the hypopygium is seen in image C); in each image, a sample of stout, spine-like seta (or microtrichia, in image I) is highlighted in orange A Brachyponera chinensis; worker (CASENT0104738) B Buniapone amblyops; worker (CASENT0384786) C Mayaponera becculata; worker (CASENT0428720) D Mesoponera melanaria macra; worker (CASENT0159302) E Myopias darioi; worker (CASENT0810080) F Parvaponera darwinii madecassa; worker (CASENT0389498) G Promyopias silvestrii; worker (CASENT00178751) H Rasopone panamensis; worker (CASENT0644252) I Thaumatomyrmex fraxini; worker (ANTWEB1008597). Images by FA Esteves (A–H) and RA Keller (I); available at AntWeb.org. Scale bars: 0.04 mm.