[3] The genus Crepidomanes is accepted in the Pteridophyte Phylogeny Group classification of 2016 (PPG I),[4] but not by some other sources.

As of October 2019[update], Plants of the World Online sank the genus into a broadly defined Trichomanes, treating this species as Trichomanes intricatum.

[5] This is an unusual filmy fern that grows in rock shelters and crevices in the eastern United States, with the southern extent in Georgia and extending north into New England.

[6] It is known only from its filamentous gametophytes and completely lacks the sporophyte generation.

Both share the same chloroplast genome, although the relationship between the two species is uncertain.