http://slugsite.us/bow/wirtz99/plate_4/wirtz_3i.htm
http://www.seaslugforum.net/showall/okenmedi
http://www.medslugs.de/E/Med/Okenia_mediterranea/Selection.htm
http://www.medslugs.de/E/Atl-E/Okenia_mediterranea/Selection.htm
http://www.retenatura.it/nudibranchi/005.htm
http://opistobranquis.info/en/guia/nudibranchia/euctenidiacea/doridacea/okenia-mediterranea/
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