There are approximately 320 described species in Aplacophora. However, it is likely there are many other species that have not been described.
- Brusca, R., G. Brusca. 2003. Invertebrates. Sunderland, Massachusetts: Sinauer Associates, Inc..
- Scheltema, A. 2001. Aplacophora. Pp. 1-18 in A Wells, W Houston, eds. Zoological Catalogue of Australia, Vol. 17.2. Melbourne, Australia: CSIRO Publishing.