Ptechetelium cyatheae is a species of fungus belonging to the order Platygloeales.

The species forms effused basidiocarps (fruit bodies) on ferns, on which it is parasitic.

[2] The fungus parasitizes host leaves, producing basidiocarps as small whitish patches that emerge through the stomata.

Microscopically, the basidia are auricularioid (tubular with lateral septa) and emerge from thick-walled probasidia.

The species has seldom been collected and is only known from Bolivia and Ecuador.