Squamule section; Habitat: Calcareous rocky grassland, scattered Juniperus and Pinus flexilis; Location: Lewis and Clark Cavern State Park, near old gypsum mines; Substrate: Soil, near old gypsum mine; Elevation: 1360 meters; Notes: Placidium lacinulatum var. atrans det O. Breuss by photo, 2005. Placidium lacinulatum var. atrans det. Breuss 2009.
Thallus section LCB; Habitat: Calcareous rocky grassland, scattered Juniperus and Pinus flexilis; Location: Lewis and Clark Cavern State Park, near old gypsum mines; Substrate: Rock, limestone boulder; Elevation: 1360 meters.
Thallus section LCB; Habitat: Calcareous rocky grassland, scattered Juniperus and Pinus flexilis; Location: Lewis and Clark Cavern State Park, near old gypsum mines; Substrate: Rock, limestone boulder; Elevation: 1360 meters.
Habit; Habitat: Calcareous rocky grassland, scattered Juniperus and Pinus flexilis; Location: Lewis and Clark Cavern State Park, near old gypsum mines; Substrate: Rock, limestone boulder; Elevation: 1360 meters.
Perithecial section; Habitat: Calcareous rocky grassland, scattered Juniperus and Pinus flexilis; Location: Lewis and Clark Cavern State Park, near old gypsum mines; Substrate: Rock, limestone; Elevation: 1360 meters; Notes: Thelidium minutulum det. O. Breuss 2012.
Thallus section; Habitat: Calcareous rocky grassland, scattered Juniperus and Pinus flexilis; Location: Lewis and Clark Cavern State Park, near old gypsum mines; Substrate: Rock, limestone; Elevation: 1360 meters; Notes: Thelidium minutulum det. O. Breuss 2012.
Habit; Habitat: Calcareous rocky grassland, scattered Juniperus and Pinus flexilis; Location: Lewis and Clark Cavern State Park, near old gypsum mines; Substrate: Rock, limestone; Elevation: 1360 meters; Notes: Thelidium minutulum det. O. Breuss 2012.
Spores; Habitat: Calcareous rocky grassland, scattered Juniperus and Pinus flexilis; Location: Lewis and Clark Cavern State Park, near old gypsum mines; Substrate: Rock, limestone; Elevation: 1360 meters; Notes: Thelidium minutulum det. O. Breuss 2012.
