Periechocrinidae
Corocrinus
Corocrinus calypso
Corocrinus nodosus
Corocrinus pettyesi
Gennaeocrinus
Gennaeocrinus eucharis
Gennaeocrinus goldringae
Gennaeocrinus nyssa
Gennaeocrinus peculiaris
Megistocrinus
Megistocrinus abnormis
Megistocrinus concavus
Megistocrinus depressus
Megistocrinus farnsworthi
Megistocrinus multidecoratus
Megistocrinus nodosus
Megistocrinus novus
Megistocrinus ontario
Megistocrinus regularis
Megistocrinus rugosus
Megistocrinus sphaeralis
Megistocrinus tuberatus