Alphabetical Listing of Families within this Taxa Group:
family
Aulacothyropsidae
T4072459
family
Bouchardiidae
T4072462
family
Dallinidae
T4072176
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
Zeilleriidae
T4072457