Subclass Myxogastromycetidae see Subclass Myxogastria Fries, 1829 Order Echinosteliales G.W. Martin (1961) see Order Echinosteliida Martin, 1961 1 Family Echinosteliaceae Rostaf. (1873) see Family Echinosteliidae Rostafinski, 1873 2 Family Clastodermataceae C.J. Alexopoulos & T.E. Brooks, 1971 see Family Clastodermidae C.J. Alexopoulos & T.E. Brooks, 1971