Radiolaria - Spumellaria - Hagiastridae

Synonym: Saldorfus Pessagno, Jr. et al. 1993

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

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

Subtaxa: Tetraditryma coldspringensis, Tetraditryma corralitosensis, Tetraditryma praeplena, Tetraditryma pseudoplena

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Ecology: passively mobile planktonic omnivore