oosphere

The protoplasm in one of these protuberances arranges itself into a round mass--the oosphere or female cell.

Mycelium present, antheridia with antherozoids, oogonium with single oosphere: Monoblepharidaceae.

Oogonium with the central uninucleate oosphere and the fertilizing tube (a) of the antheridium which introduces the male nucleus.

The product of the union of an antherozoid and an oosphere is termed an oospore.