Timothy B. Wheeler

Schaereria brunnea is a species of lichen in the family Schaereriaceae, first found in inland rainforests of British Columbia. This rare lichen forms very thin crusts made up of small pale brown patches, each topped with distinctive chocolate-brown barrel-shaped fruiting bodies that distinguish it from other tree-dwelling species in its genus. It was originally known from only three collections made between 1992 and 2007, all found growing on branches of western hemlock trees in ancient, misty forests over five centuries old. It has since been documented in Alaska.

Sarcogyne albothallina is a species of rock-dwelling, crustose lichen-forming fungus in the family Acarosporaceae. It was formally described as a new species in 2016 from specimens collected from the Missouri Breaks region of Montana. It is differentiated from others in Sarcogyne by its white, non-powdery thallus and by the presence of 4-O-methylhiascic acid, a combination of features that separates it from other species sharing a blackened upper spore-bearing surface (carbonized epihymenium).

Hypogymnia amplexa is a species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. It is found in the western United States and Canada.

Antidea is a fungal genus in the family Megasporaceae (order Pertusariales). It comprises the single species Antidea brucei, a crustose lichen that forms small gray patches of tightly packed tiles on siliceous rocks. The species was originally described as Aspicilia brucei in 2007 from California, but DNA studies showed it represented an early-diverging lineage within Megasporaceae, leading to its placement in a new genus in 2024. Known primarily from mid-elevation forested sites in southwestern North America, the species has also been reported from parts of Europe.

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Gyalectaria diluta is a species of crustose lichen in the family Coccotremataceae, first found in inland rainforests of British Columbia. This pale, crust-forming lichen grows on the bark of conifer trees in very humid old-growth forests, where it forms small patches that bleach the underlying bark to whitish or pale green-grey colours. It is found from British Columbia to Montana and Idaho, typically growing on smooth bark of young cedar saplings beneath mature forest canopies that have remained undisturbed for centuries.