Alphabetical Listing of Families within this Taxa Group:

family     Aulacothyropsidae		T4072459
family     Bouchardiidae		T4072462
family     Cancellothyrididae		T4072175
family     Chlidonophoridae		T4072456
family     Dallinidae		T4072176
family     Dyscoliidae		T4072455
family     Dyscolioidea incertae sedis		T4072757
family     Frenulinidae		T4072460
family     Kingenidae		T4072458
family     Kraussinidae		T4072177
family     Laqueidae		T4072368
family     Megathyrididae		T4072178
family     Platidiidae		T4072179
family     Terebrataliidae		T4072461
family     Terebratellidae		T4072463
family     Terebratulidae		T4072180
family     Zeilleriidae		T4072457