Figures 9-12 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 9-12 - Volsella muscles and morphology; the parossiculus is composed of the basivolsella and distivolsella. 9 Formica obscuripes ventral view; inset mesal with digitus removed, dorsal left; both 0.5 mm 10 Messor andrei mesal view, dash indicates base of twisted lamina and part of setose ridge; inset dorsal; both 0.2 mm 11 Labidus coecus mesal view, 1.0 mm 12 Neivamyrmex longiscapus lateral view, 0.5 mm. Stippling on 9 and 12 indicate setal bases. Abbreviations: Bm basimere; Bv basivolsella; Ca cuspal apodeme; Cs cuspis; Di digitus; Vm volsellar membrane. Muscles: p qr t;insertion of muscle 'x': xi; origin of muscle 'x': xo.