Basionym Name:Protostelium irregulare L.S. Olive & Stoian., [as 'irregularis'] Am. J. Bot. 56: 983 (1969)
Homotypic synonyms:Soliformovum irregulare (L.S. Olive & Stoian.) Spiegel, [as 'irregularis'], in Spiegel, Gecks & Feldman, J. Eukary. Microbiol. 41(5): 518 (1994)