Knudsen, Kerry & James C. Lendemer. Changes and additions to the North American lichen flora. — IV. Mycotaxon 93: 289-295. 2005.

ABSTRACT: Acarospora intercedens and A. radicata are placed in synonymy with A. socialis. A. peltastica and A. utahensis are placed in synonymy with A. strigata. Thelocarpon albomarginatum is placed in synonymy with A. washingtonensis. A neotype is selected for A. peltastica. A lectotype is selected for A. strigata. Hypotrachyna afrorevoluta is reported as new to North America.

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