L. ahlneri L. canadense L. saxicola L. sirosiphoideum Lichinodium is a genus of filamentous lichens.

[3][4][5] Lichinodium used to be classified in the Lichinomycetes, but molecular phylogenetic analysis published in 2018 showed that the genus was incorrectly classified there, and that instead it represents a new lichen-forming lineage in the superclass Sordariomyceta (containing the (Leotiomycetes, Laboulbeniomycetes, and the Sordariomycetes), a major fungal group that was not previously known to have any lichenised species.

Lichinodium has a sister taxon relationship with the family Leotiaceae, and thus the order Lichinodiales is placed in the class Leotiomycetes.

The photobiont partner of Lichinodium is from Rhizonema, a genus of filamentous cyanobacteria in family Nostocaceae.

Lichinodium species generally prefer cool, humid environments, where they grow on conifer twigs, tree trunks, or rocks, sometimes along with or overgrowing other mosses and lichens.