Figure 1From: Mating behaviour in the sea slug Elysia timida (Opisthobranchia, Sacoglossa): hypodermic injection, sperm transfer and balanced reciprocity Mating sequence of E. timida. A Head-to-head contact B Copulation position C Hypodermic transfer, showing extended penises (p, marked red) D Start of circling E Circling F End of circling G Sperm transfer into female aperture. Drawings by V. Schmitt from video recordings.Back to article page