Fig. 5 in A new species of Oopeltidae (Mollusca, Pulmonata, Arionoidea), with a revision of the subfamily Ariopeltinae and remarks on its affinities within the family and superfamily

Fig. 5. Ariopelta capensis, second and third parts of penis cut open to show calcareous spines intruding into the lumen: (2) second part with smaller spines, (3) third part with larger spines.