 Based on ancestral reconstruction studies , the earliest ( basal ) members of the Sclerodermatineae originated in the late Cretaceous ( 145 – 66 Ma ) . The major genera diversified near the mid Cenozoic ( 66 – 0 Ma ) . Asia and North America are the most probable ancestral areas for all Sclerodermatineae , and <unk> and angiosperms ( primarily <unk> ) are the most probable ancestral hosts . 
