It is hypothesized that autogamy occurs during the initial formation of the spore sac and that allogamy is also possible during this time.

Single celled, presaccular stages form aggregates within the metacoel of this host which resolve into spore sacs.

Ascomycetes, or " Spore sac fungi," where the spores are produced in delicate sacs called asci.

( Spore sac fungi or Ascomycetes.)

(The genera described under Section B. all belong to the order of Discomycetes, fungi that have the spore sacs collected in a flattened disc.)