Copulabyssia tenuis belongs to the Pseudococculinidae family of the Lepetelloidea superfamily,  a superfamily of sea snails, small deepwater limpets, and marine gastropod mollusks..
Family: Pseudococculinidae Superfamily: Lepetelloidea Lepetelloidea is a superfamily of sea snails, small deepwater limpets, marine gastropod mollusks in the clade Vetigastropoda (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). 
