I did find a bit more information and a warning about handling Onygena corvina on another web site. http://johandierckx.aminus3.com/image/2010-12-08.html

This is the warning from the above url “But because the species is specialized in infecting keratin it can be really dangerous to touch the species: our fingernails are mostly made of translucent keratin !”

I wonder if these fungi could be useful with proper precautions…?