Alphabetical Listing of Families within this Taxa Group:

family     Amphimelaniidae		T4023703
family     Batillariidae		T4035362
family     Cerithiidae		T4035301
family     Dialidae		T4023279
family     Hemisinidae		T4023751
family     Litiopidae		T4035322
family     Melanopsidae		T4023672
family     Modulidae		T4016342
family     Pachychilidae		T4023578
family     Paludomidae		T4023683
family     Pickworthiidae		T4023509
family     Planaxidae		T4035327
family     Pleuroceridae		T4023684
family     Potamididae		T4035328
family     Scaliolidae		T4023292
family     Semisulcospiridae		T4035380
family     Siliquariidae		T4023295
family     Thiaridae		T4035354
family     Turritellidae		T4031355
family     Zemelanopsidae		T4023755