The stipe is about 7 mm diameter and the cap roughly 7 cm. It is initially white and dry on the outside. It looks and smells very much like a supermarket Agaricus mushroom, except it has a wider and thinner cap and a longer and thinner stipe.
It was found sprouting from woven polypropylene sacks full of human feces (plus a mix of sawdust and wood ash that was added to cover the fresh feces). These sacks were filled in Urine-diverting Dry Toilets in Puyo, Ecuador (900 meters elevation, on the edge between Amazonia and the Andes). These were stored for over 2 years, protected from rain, but on the soil and thus absorbing some humidity from it via capillary action. More info on these ecologically friendly toilets on my blog, http://www.inodoroseco.
Is this species known to be associated with feces? Or is it mainly digesting the sawdust?
Could it be destroying Ascaris helminth eggs, other pathogens, etc.?
Chris Canaday, firstname.lastname@example.org