Aphelognathus Branson, Mehl & Branson, 1951 † (original description)
Arenoparrella Andersen, 1951 (original description)
Artoperina Campbell, 1951 (original description)
Bassleridiscus Fisher, 1951 † (original description)
Bisaccium Andersen, 1951 (original description)
Bronaughocrinus Strimple, 1951 † (original description)
Buttsia Wilson, 1951 † (original description)
Calosphaera Campbell, 1951 † (original description)
Cliffia Wilson, 1951 † (original description)
Corythomelissa Campbell, 1951 † (original description)
Crepichilella Wilson, 1951 † (original description)
Croixana Nelson, 1951 † (original description)
Cryptophyllus Levinson, 1951 † (original description)
Dimelissa Campbell, 1951 † (original description)
Drabia Wilson, 1951 † (original description)
Ekvasophyllum Parks, 1951 † (original description)
Eoligonodina Branson, Mehl & Branson, 1951 † (original description)
Eoptychaspis Nelson, 1951 † (original description)
Eulophospyris Campbell, 1951 † (original description)
Faberophyllum Parks, 1951 † (original description)
Glycobotrys Campbell, 1951 † (original description)
Haliphormartidium Campbell, 1951 † (original description)
Heliomeroides Evitt, 1951 † (original description)
Heliosocrinus Strimple, 1951 † (original description)
Labyrinthina Weynschenk, 1951 † (original description)
Llanoaspidella Tasch, 1951 † (original description)
Missisquoia Shaw, 1951 † accepted as Parakoldinioidia Endo, 1937 † (original description)
Paianocrinus Strimple, 1951 † (original description)
Pealerina Lalicker, 1950 † (original description)
Phormostichoartus Campbell, 1951 (original description)
Phyletripes Campbell, 1951 † (original description)
Pinctus Wilson, 1951 † (original description)
Plicatolina Shaw, 1951 † (original description)
Pseudosaratogia Wilson, 1951 † (original description)
Rhipidognathus Branson, Mehl & Branson, 1951 † (original description)
Shidelerites Morris & Hill, 1951 † (original description)
Stigmaspis Nelson, 1951 † (original description)
Thecotapus Campbell, 1951 † (original description)
Tropidopyge Harrington & Kay, 1951 † (original description)
Turbophyllum Parks, 1951 † (original description)
Zygognathus Branson, Mehl & Branson, 1951 † (original description)