The group is a subclass of the Trematoda, and sister group to the Digenea. Species are between approximately one mm to several cm long. They are parasites of freshwater and marine molluscs and vertebrates (cartilaginous and bony fishes and turtles). Maturation may occur in the mollusc or vertebrate host.
- Aspidogastrea from Tree of Life
- Checklist of European aspidogastreans Archived 2004-10-12 at the Wayback Machine
- Fishdisease.net Archived 2007-10-15 at the Wayback Machine