On Acarospora sp. ID unconfirmed but seems to fit well with spores 15-17x7-8µ, attenuated at one end.
On mudstone, Gazos Creek Road. Spores massive with thick walls: 64-79 X 34-37 um, walls 5.5-7.5 um thick. All spot tests negative except K on Epihymenium and spores which is K+ purple.