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SUMMARY
Sexual reproduction is reported for Gonapodya, a genus of the aquatic Phycomycetes. This sexual process is characterized by the fertilization of a relatively large non-flagellate egg by a small, posteriorly uniflagellate antherozoid. The fusion is for a time incomplete, the zygote becoming actively motile, propelled by the male flagellum. Encystment follows the motile stage, resulting in the formation of a smooth-walled spherical oospore.
Description of the sexual phase of each of the two species of Gonapodya, G. prolifera and G. polymorpha, are given.
The relationship of Gonapodya to established genera of the order Monoblepharidales, especially Monoblepharella, is indicated, and, it is believed, justifies the inclusion of Gonapodya in that order.
