http://www.pictonb.freeserve.co.uk/nudibranchs/facann.html
http://slugsite.us/bow/wirtz99/plate_5/wirtz_3s.htm
http://www.seaslugforum.net/showall/faceannu
http://www.medslugs.de/E/Atl-E/Facelina_annulicornis/Selection.htm
http://www.ugr.es/~lstocino/f__annulicornis.htm
http://marenostrum.org/opistobranquios/fannulicornis/index.htm
http://www.medslugs.de/E/Med/Facelina_annulicornis/Selection.htm
http://www.nembro.info/uk_facelina_annulicornis.html
http://www.medslugs.de/E/Atl-NE/Facelina_annulicornis/Selection.htm
http://www.nudibranch.org/Scottish%20Nudibranchs/facelina-annulicornis.html
http://www.nudipixel.net/species/facelina_annulicornis/
http://hypselodoris.blogspot.pt/2010/08/facelina-annulicornis-chamisso.html
http://opistobranquis.info/en/guia/nudibranchia/dexiarchia/aeolidida/facelina-annulicornis/
http://slugsite.us/bow2007/nudwk995.htm