Class Aplacophora
- Information from the Animal Diversity Web on these molluscs, their habitat, systematic and taxonomic history, physical description, reproduction and behavior.
- http://animaldiversity.ummz.umich.edu/site/accounts/information/Aplacophora.html

The Taxonomy of the Aplacophora
- Information on these deep-sea mollusks and their anatomy, with photographs of several species.
- http://www.whoi.edu/science/B/aplacophora/