Pelagiellidae is an extinct family of Paleozoic fossil 'snails'. Some material assigned to this taxon represents gastropod molluscs, but some chaeta-bearing specimens first assigned to Pelagiella (now Pseudopelagiella) are perhaps better interpreted as tube-bearing annelid worms.[3]
The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005[5] categorizes Pelagiellidae in the superfamilia Pelagielloidea within thePaleozoic molluscs of uncertain systematic position. This family has no subfamilies.
According to P. Yu. Parkhaev, the family Pelagiellidae is in the order Pelagiellifomes MacKinnon, 1985 within the subclass Archaeobranchia Parkhaev, 2001, in the class Helcionelloida Peel, 1991.