United States, Utah, San Juan County, Bridger Jack Mesa, talus slope on S side near head of side canyon ca. 1 km WSW of small camp on bench on N side of road ca. 14 km S on Beef Basin Road from park road
37.981 -109.63 +-50m.
1950 meters (6396ft)
steep shady N-facing large blocky calcareous sandstone talus slope in head of small side-canyon
weakly calcareous sandstone
Acarospora fuscescens, Rinodina castanomela
rims whitish over red-brown, strongly cracked, K- C- KC-; disk dark red-brown, epruinose; epihymenium red-brown, POL- mostly; hymenium ~60um, clear; subhymenium inspersed; cortex strongly brown-granular POL+ scarcely clearing in K, ~25-40um but irregular and indistinct; medulla POL+ weak, clearing mostly in K; spores ~9-11x5um