As long ago as 1979 it has been known to not have a close relationship with either the Dictyosteliida or the Acrasidae, the two well-established groups of cellular slime molds.
Xa en 1979 se sabía que non tiña unha estreita relación nin cos Dictyosteliida nin cos Acrasidae, que son os dous grupos ben establecidos dos mofos mucosos celulares.