Peridioles are components of the gleba of gasterothecia. They are lens- to disc-shaped, about 1–2 mm in diameter, each containing a glebal chamber and enclosed by a secondary peridium. They function as diaspores. Initially, each peridiole is connected to the peridium by a strand of trama. These strands become mucilaginous and serve as attachment threads when the peridioles are ejected by water droplets from the funnel-shaped, mature fruiting bodies.

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