Distribution: Washington, largely east of Cascades crest; Oregon, California, Idaho, Montana; British Columbia.
Habitat: Subalpine, intermontane.
Substrate: Whitebark Pine, Subalpine Larch.
Conservation Status: Not of concern
Thallus pale yellowish-green, dull, margins often greenish-black; lobes thin, 2-4 mm across, closely appressed and wrinkled; lower surface light tan with short, woolly rhizines; Apothecia large, pale brown.
PNW Herbaria: Specimen records of Ahtiana sphaerosporella in the Consortium of Pacific Northwest Herbaria database
CalPhotos: Ahtiana sphaerosporella photos