Trochoidea & Candidula are in Hygromiidae. See http://www.gnm.se/clecom.htm Aydin On Wed, 2 Apr 2003 09:51:57 -0300, Marcus Coltro <[log in to unmask]> wrote: >I have some shells listed in my database and noticed some genus are listed under Helicidae and others in Hygromiidae, as Trochoidea, Candidula and others. Which is the correct one ? (some were listed as Helicellidae as well Marcus