Serpula himantioides is a species of fungus that causes damage to timber referred to as dry rot.

Recent molecular work demonstrates that S. himantioides is a species complex including multiple cryptic lineages.

It produces thin, resupinate (inverted), membranous fan-like basidiocarps that are brownish in color and appear as distinctive fruiting bodies on the exterior of the host.

[5] It also a common cause of timber rotting in buildings, which has made this pathogen difficult to differentiate from S. lacrymans because of their similarities.

[5] It is considered the wild sister species of S. lacrymans, the pathogen that causes dry rot in wooden building structures.