Figures 1-4 from: Boudinot B (2013) The male genitalia of ants: musculature, homology, and functional morphology (Hymenoptera, Aculeata, Formicidae). Journal of Hymenoptera Research 30: 29-49. https://doi.org/10.3897/jhr.30.3535

Figures 1-4 - Genital capsule and sternum IX habitus and musculature. 1 Formica obscuripes lateral oblique view, 0.5 mm 2 Messor andrei dorsal view, 0.5 mm 3 Labidus praedator dorsal view, 1.0 mm 4 Formica obscuripes sternum IX anterior-to-posterior oblique mesal view, 0.5 mm. Abbreviations: Bm basimere; Cr cranial apodeme of sternum IX; Cs cuspis; Cu cupula; Di digitus; Dl dorsolateral apodeme of cupula; Do dorsal apodeme of cupula; Lc lateral apodeme of cupula; Lm valviceps lamina; Ma maculation; Pm penisvalva membrane; Pt phallotrema; Sp spiculum; Te telomere; Tm telomeral membrane; Vm volsellar membrane; Vu valvura. Muscles: a b c d e f g h i j k l p qr t;insertion of muscle 'x': xi; origin of muscle 'x': xo.