Radiolaria - Spumellaria - Hagiastridae

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

Sister taxa: Archaeohagiastrum, Crucella, Hagiastrum, Higumastra, Monotrabs, Pobum, Pseudocrucella, Pseudohigumastra, Pterotrabs, Savaryella, Sophia, Tetraditryma, Tetraporobrachia, Tetratrabs, Udalia

Subtaxa: Pseudohagiastrum giganteum, Pseudohagiastrum monstruosum, Pseudohagiastrum tasuense

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Ecology: passively mobile planktonic omnivore