Radiolaria - Nassellaria - Williriedellidae

Synonym: Praezhamoidellum Kozur 1984

Parent taxon: Williriedellidae according to D. M. Hull 1997

Sister taxa: Cryptamphorella, Excentropylomma, Helvetocapsa, Hiscocapsa, Holocryptocanium, Holocryptocapsa, Immersothorax, Kozurium, Minocapsa, Praewilliriedellum, Striatojaponocapsa, Trisyringium, Williriedellum, Zhamoidellum

Subtaxa: Hemicryptocapsa capita, Hemicryptocapsa polyhedra, Hemicryptocapsa yaoi, Praezhamoidellum buekkense

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Ecology: passively mobile planktonic omnivore