SUMMARY
Syncephalis sphaerica (PiptocephaUdaceae, Mucorales) is a biotrophic, haustorial mycoparasite. Fifty genera of fungi, representing four classes, were tested as potential hosts for the parasite. Twenty genera of Mucorales supported growth and sporulation of S. sphaerica. A single ascomycete (a yeast) and two members of the Deuteromycetes were also parasitized by S. sphaerica. None of the Basidiomycetes tested supported growth of the parasite.
Axenic culture of S. sphaerica was partially successful, with dense mycelial growth and some sporulation on certain media. The use of certain filtrates with host exudates as well as the use of killed mycelium to support growth was unsuccessful. The host range and axenic culture of S. sphaerica are compared to S. californica and species of Piptocephalis.