http://www.ugr.es/~lstocino/hermaea_pucicirra.htm
http://www.medslugs.de/E/Med/Hermaea_paucicirra/Selection.htm
http://www.seaslugforum.net/showall/hermpauc
http://opistobranquis.info/en/guia/sacoglossa/hermaea-paucicirra/