Subclass Myxogastromycetidae see Subclass Myxogastria Fries, 1829 Order Physarales T. Macbr. (1899) see Order Physarida Macbride, 1922 Family Didymiaceae Rostaf. (1875) see Family Didymiidae Rostafiński, 1873 Genus Didymium Schrader, 1797