Author: Jan Scholten
Genera: 1 Family; 1 genus; 1 species; Polypodium hydriform.
Clades: Polypodiidae; Polypodiidea; Polypodiozoa; Cnidaria; Rdaiata; Animals.
Polypodium hydriform is a parasite attacking the eggs of sturgeon and similar fishes, Acipenseridae and Polyodontidae. It is one of the few metazoans (animals) that live inside the cells of other animals.