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Tribrachidium was named by Glaessner (1959) [Sepkoski's age data: V u Sepkoski's reference number: 647]. It is not extant. Its type is Tribrachidium heraldicum.

It was assigned to Trilobozoa by Sepkoski (2002); and to Triradialomorpha by Erwin et al. (2011).

Synonymy list
YearName and author
1959Tribrachidium Glaessner p. 389 figs. pl. 47, Figs. 7-8
2002Tribrachidium Sepkoski, Jr.
2011Tribrachidium Erwin et al. pp. Table S5

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genusTribrachidiumGlaessner 1959

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

No diagnoses are available