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†family Eucyrtiidae Ehrenberg 1847 (radiolarian)

Radiolaria - Nassellaria

PaleoDB taxon number: 66335

Synonym: Theoperidae Haeckel 1881 (taxon 66336)

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

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

Subtaxa: Dictyocephalus, Ectonocorys, Eusyringium, Lithochytris, Lychnocanium, Rhopalatractus, Rhopalocanium, Sethochytris, Tetracapsa, Theopera, Theophaena, Theopodium

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Ecology: passively mobile planktonic omnivore