Alphabetical Listing of Families within this Taxa Group:

family     Byrsophlebidae		T4032530
family     Dalyelliidae		T4026906
family     Diceratocephalidae		T4031372
family     Kytorhynchidae		T4072382
family     Promesostomidae		T4026909
family     Temnocephalidae		T4031373
family     Trigonostomidae		T4026910
family     Typhloplanidae		T4072356