Physarum caesium Shuang L.Chen & Yu Li, 1998 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Protozoa phylum Mycetozoa class Myxomycetes order Physarales family Physaraceae genus Physarum species Physarum caesiellum Name Homonyms Physarum caesium Shuang L.Chen & Yu Li, 1998 Physarum caesium (Schumach.) Fr., 1829