Structure of the vagina in Echinorhynchus spp. A E. brayi, a species with a single vaginal sphincter B E. salmonis, a species with two vaginal sphincters.

 
 
  Part of: Wayland MT, Vainio JK, Gibson DI, Herniou EA, Littlewood TDJ, Väinölä R (2015) The systematics of Echinorhynchus Zoega in Müller, 1776 (Acanthocephala, Echinorhynchidae) elucidated by nuclear and mitochondrial sequence data from eight European taxa. ZooKeys 484: 25-52. https://doi.org/10.3897/zookeys.484.9132