Figure_1.tif (2.42 MB)
Reciprocal copulation of Siphopteron quadrispinosum.
figure
posted on 2013-02-20, 00:27 authored by Rolanda Lange, Tobias Gerlach, Joscha Beninde, Johanna Werminghausen, Verena Reichel, Nils AnthesThe bipartite penises, which are everted as largely translucent structures at the right front of the head (h), are reciprocally inserted into the partner. While the actual penis (p) is inserted into the gonopore (located behind the right parapod), the penile stylets (s) are hypodermically inserted into the foot of the partner. Markings are only shown for the lower animal.