Tribrachidium was a strange genus of ediacara which has been found in Russian, Ukraine, and Australia. 

Tribrachidium has been described as a member of many groups. It probably lived on the bottom of the ocean filtering food. Like many animals from the Ediacaran Period, Tribrachidium was mysterious and little is known about it.

ABC Age Seven

[But was there an oktokaiogdoekontabrachidium?  We can only surmise...]

(Courtesy Mr Know-it-all)