''Tribrachium'' is a monotypic genus of

sponge Sponges, the members of the phylum Porifera (; meaning 'pore bearer'), are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through t ...

s belonging to the family

Ancorinidae Ancorinidae is a family of marine sponges belonging to the order of Tetractinellida. Genera *''Ancorina'' Schmidt, 1862 *'' Asteropus'' Sollas, 1888 *'' Chelotropella'' Lendenfeld, 1907 *'' Cryptosyringa'' Vacelet, 1979 *'' Dercitus'' Gray, ...

. The only species is ''Tribrachium schmidtii''. The species is found in Southern America and Australia.

References

{{Taxonbar, from1=Q6538478, from2=Q2669573 Tetractinellida Monotypic sponge genera