Polycystinea - Nassellaria - Theocotylidae
Parent taxon: Eucyrtidiacea according to P. De Wever et al. 2001
Sister taxa: Bekomidae, Eucyrtidiidae, Eucyrtiidae, Lophocyrtiidae, Obeliscoitidae, Pseudodictyomitridae, Xitidae
Subtaxa: Axocorys Lamptonium Pterocodon Theocotyle Thyrsocyrtis
Type: Theocotyle
Distribution:
• Pliocene of North Pacific (2 collections)
• Oligocene of North Pacific (6), South Pacific (1)
• Eocene to Oligocene of North Pacific (2)
• Eocene of Cyprus (6), Indian Ocean (1), North Atlantic (16), North Pacific (181), South Pacific (17)
• Paleocene to Eocene of North Atlantic (2)
• Paleocene of Cyprus (1), North Atlantic (4)
• Cretaceous to Paleogene of North Atlantic (1)
• Cretaceous of Poland (1)
Total: 241 collections including 732 occurrences