CLASS METCHNIKOVELLOMYCETES

• Spores are spherical to lens-shaped with openings on the broad side of the spore, but polar filaments extrude laterally; form thick-walled pansporoblasts.

• ORDER METCHNICOVELLALES.
  • Metchnikovella, Chytridiopsis, Hessea.

CLASS MICROSPOROMYCETES

• This is the main group of the microsporidians which includes species with elongate or tubular spores, each with a long, coiled polar filament and sporoplasm which may be uni- or bi-nucleate. This class has 2 orders.

• ORDER GLUGEALES (PLEISTOPHOPIDIDA)
  • Spores uninucleate; thin-walled (some with binucleate thick-walled stages); most directly infective (perorally).
  • Glugea, Perezia, Pleistophora, Telomyxa, Telohania, Amblyospora, Culicospora, Encephalitozoon.

• ORDER NOSEMALES
  • Spores binucleate; spore long, narrow, cylindrical with elongate nuclei coiled around a manubrium (basal part of the polar filament).
  • Nosema, Octosporea, Caudosporea, Mrazekia.