Corticium penicillatum is a species of fungus in the class Agaricomycetes.

It is a corticioid fungus and a plant pathogen, the causal agent of coconut thread blight, a leaf disease of coconut palms.

The species was originally described from Papua New Guinea in 1925 and has since been reported from Vanuatu, Fiji, and the Solomon Islands.

[1] Corticium penicillatum has never been redescribed or reviewed and is unlikely to be a species of Corticium in the modern sense.

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