Translucent peripheral area of phallobase (d in Fig. 1A) of male A. uliginosus s. l. A–C #G06 specimen from Crailsheim (Germany) D nearly completely sclerotized basal area of aedeagus of an old male A. uliginosus sensu stricto #P01 specimen from Rudna, Mühlgast, Poland with both radial and circular filaments. Arrows indicate the outer margin of d in Fig. 1A, and radially arranged filaments between c and d are clearly visible, especially on C E spermatozoans from spermatic duct of elder male #H27 from Hungary (see also Figs 1I, 4C). Magnifications: A 32-fold B 100-fold C 200-fold D 100-fold E 400-fold.