“…1) Since long ago, therefore, those strains have been studied variously as to their phylogeny, physiology, genetics, and biochemistry, and many researchers have reported new species, classified by morphological and physiological characteristics. 2) Schipper and Stalpers 2) revised the classification of the genus mainly by growth temperature, size of sporangia and sporangiophore, and branching of rhizoid, and classified all the species of the genus into three groups: the stolonifer-group, R. oryzae, and the microsporus-group, with the re-integration of many species.…”