http://slugsite.us/bow/nudiwk63.html
http://slugsite.us/bow/pan/convolvu.html
http://slugsite.us/bow/lab_10.htm
http://slugsite.us/bow/histo.pdf
http://www.underwaterkwaj.com/nudi/cortez/sc009.htm
https://www.inaturalist.org/taxa/1089997-Histiomena-marginata
http://www.medslugs.de/E/Pac-E/Histiomena_marginata/Selection.htm