 Sclerodermatineae is a suborder of the fungal order Boletales . <unk> in 2002 by <unk> Manfred Binder and Andreas <unk> , it contains nine genera and about 80 species . The suborder contains a diverse assemblage fruit body morphologies , including <unk> , gasteroid forms , earthstars ( genus Astraeus ) , and <unk> . Most species are ectomycorrhizal , although the ecological role of some species is not known with certainty . The suborder is thought to have originated in the late Cretaceous ( 145 – 66 Ma ) in Asia and North America , and the major genera diversified around the mid Cenozoic ( 66 – 0 Ma ) . 
