Alphabetical Listing of Families within this Taxa Group:

family     Paleopneustidae		T4023660
family     Paleopneustina incertae sedis A		T4023661
family     Paleopneustina incertae sedis B		T4023662
family     Pericosmidae		T4023501
family     Prenasteridae		T4023663
family     Schizasteridae		T4023412