Alphabetical Listing of Families within this Taxa Group:
family     Aulacothyropsidae T4072459
family     Basiliolidae T4072451
family     Bouchardiidae T4072462
family     Cancellothyrididae T4072175
family     Chlidonophoridae T4072456
family     Craniidae T4072171
family     Cryptoporidae T4072172
family     Dallinidae T4072176
family     Discinidae T4072417
family     Dyscoliidae T4072455
family     Dyscolioidea incertae sedis T4072757
family     Frenulinidae T4072460
family     Frieleiidae T4072173
family     Hemithirididae T4072174
family     Kingenidae T4072458
family     Kraussinidae T4072177
family     Laqueidae T4072368
family     Lingulidae T4072450
family     Megathyrididae T4072178
family     Notosariidae T4072452
family     Platidiidae T4072179
family     Terebrataliidae T4072461
family     Terebratellidae T4072463
family     Terebratulidae T4072180
family     Thecideidae T4072454
family     Thecidellinidae T4072453
family     Zeilleriidae T4072457