†family Eucyrtiidae Ehrenberg 1847 (radiolarian)

Protozoa - Nassellaria - Eucyrtiidae

Synonym: Theoperidae Haeckel 1881

Parent taxon: Eucyrtidiacea according to P. De Wever et al. 2001

See also Sharma and Takahashi 2007 and Zügel 1997

Sister taxa: Bekomidae, Eucyrtidiidae, Lophocyrtiidae, Obeliscoitidae, Pseudodictyomitridae, Theocotylidae, Xitidae

Subtaxa: Anthocyrtis Cyrtopera Dictyophimus Dictyopodium Ectonocorys Eusyringium Gondwanaria Lithochytris Lithostrobus Lychnocanium Pterosyringium Rhopalatractus Rhopalocanium Sethochytris Tetracapsa Theocorys Theopera Theophaena Theopodium Udan Valkyria

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Ecology: passively mobile planktonic omnivore

Distribution:

• NN21 of North Pacific (6 collections)

• Quaternary of Japan (8), North Pacific (253), Southern Ocean (2)

• C2 of North Pacific (2)

• Pliocene to Pleistocene of North Pacific (1)

• Pliocene of North Pacific (18), Southern Ocean (10)

• Neodenticula kamtschatica of North Pacific (3)

• Miocene to Pliocene of North Pacific (1)

• Miocene of Ecuador (1), Japan (1), North Pacific (54), South Pacific (1), Southern Ocean (12)

• Oligocene of North Pacific (20), South Pacific (2)

• Eocene to Oligocene of North Pacific (4), South Pacific (2)

• Eocene of Cyprus (6), North Atlantic (17), North Pacific (141), Peru (1), South Pacific (51)

• Paleocene to Eocene of North Atlantic (2), South Pacific (1)

• Paleocene of China (1), Cyprus (1), New Zealand (29), North Atlantic (3), South Pacific (1)

• Cretaceous to Paleogene of North Atlantic (1)

• Cretaceous of Antarctica (1), Austria (2), Canada (1: Nunavut), Japan (4), New Zealand (7), Oman (5), the Russian Federation (6)

• Jurassic of Antarctica (12), Austria (4), Canada (8: British Columbia), Germany (1), Italy (2), Japan (6), the Philippines (1), the Russian Federation (8), Türkiye (1), United States (8: California)

Total: 733 collections including 1171 occurrences

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