http://www.nmr-pics.nl/Cavoliniidae/album/index.html
http://www.seaslugsofhawaii.com/species/Creseis-virgula-a.html
http://species-identification.org/species.php?species_group=pelagic_molluscs&menuentry=soorten&id=268
http://species-identification.org/species.php?species_group=pelagic_molluscs&menuentry=soorten&id=269
http://species-identification.org/species.php?species_group=pelagic_molluscs&menuentry=soorten&id=270
http://opistobranquis.info/en/guia/thecosomata/creseis-virgula/
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