Marchantiana occidentalis

Species of lichen

Marchantiana occidentalis is a species of corticolous and saxicolous, crustose lichen in the family Teloschistaceae. It is found in Western Australia, usually as an inhabitant of dry twigs, bark, or wood of various plant species, but occasionally on granite rock outcrops. It forms a well-developed thallus, shiny and composed of tiny dark greenish to brown areoles, with sizes typically ranging from 5–15 mm, though larger aggregations are possible. It features numerous rounded apothecia scattered across its surface, varying in form and colour, with a distinct margin and disc.

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