FIGURE 1 in On spermatophore-producing aquatic microdrile oligochaetes (Annelida: Clitellata)

FIGURE 1. Spermatophores in several clitellates. A. Bothrioneurum vejdovskyanum (from Timm's collection S-1102). B. Paranadrilus descolei (from Marchese's collection). C. Uktena riparia (Fend's collection). D. Aktedrilus labeosus (NMNH 59663), ventral side of segment XII. E–F. Spermatophores in the lumbricid Eisenia fetida, small mucous disc containing sperm (E), and detail after dissection (F). G–I. Spermatophores in the leech Helobdella spp., extruded from the male pore (G,H), and detail showing the double-tube structure of the spermatophore (I), corresponding to the paired atrial cornua. Abbreviation: sph spermatophore, s sperm.