Diagrammatic summary of ♂ genital and pregenital sclerites in the Formicidae considered in the scope of this study, using Myrmica ruginodis Nylander as template. Mediolateral arrangement of overlapping sclerites in Figure 2A is not true to life, for visual clarity. A profile view of considered male genital and pregenital sclerites, exploded. B ventral view of male genital and pregenital sclerites, exploded. C Habitus of male Myrmica ruginodis, profile view (CASENT0902305; from AntWeb.org, Ziv Lieberman). D inset of same profile view, with included genital and pregenital sclerites diagrammed in situ. Abbreviations: ASVIII = abdominal sternite VIII; ASIX = abdominal sternite IX; ATIX = abdominal tergite IX; acsS8 = antecosta of abdominal sternite VIII; cer = cercus; cup = cupula; gct = gonocoxital arm; gcx = gonocoxite; ltp = lateropenite; prs = parossiculus; psc = penial sclerite; spc = spiculum; stl = gonostylus; vlv = valvura; vol = volsella.