Distribution: Kittitas County in Washington; southern California, Utah, Arizona, Colorado, New Mexico, North Dakota, South Dakota; Alberta, Saskatchewan.
Substrate: On calcareous rock.
Conservation Status: Not of concern
Thallus light grey to yellowish-grey areoles, heavily pruinose, 0.5-1.5 mm forming an almost continuous crust. Apothecia sunken, reddish-brown, with or without pruina.
PNW Herbaria: Specimen records of Acarospora strigata in the Consortium of Pacific Northwest Herbaria database
CalPhotos: Acarospora strigata photos