References

Martin D, Nygren A, Hjelmstedt P, Drake P, Gil J. 2015. On the enigmatic symbiotic polychaete “Parasyllidea” humesi Pettibone, 1961 (Hesionidae): taxonomy, phylogeny and behaviour. Zoological Journal of the Linnean Society 174: 429-446. http://dx.doi.org/10.1111/zoj.12249