1. Gaither TW, Collins OR (1984) Comparative SEM observations of sporophore characteristics in three species of Didymium (Myxomycetes, Physarales). Mycologia 76:650–664
2. Illana C, Moreno G, Castillo A (1997) Myxomycetes of Spain. IX. Critical and rare taxa in Extremadura. Cryptogam Mycol 18:233–246
3. Kowalski DT (1973) Notes on western myxomycetes. Madroño 22:151–153
4. Martin GW, Alexopoulos CJ (1969) The myxomycetes. University of Iowa Press, Iowa City, IA
5. Moreno G, Castillo A, Illana C, Lizárraga M (1997) Taxonomic status of Didymium laxifilum and D. rubeopus, incl. a new variety of D. rubeopus (Myxomycetes). Cryptogam Mycol 18:315–325