Tulosesus mitrinodulisporus is a species of dung‑inhabiting agaric fungus in the family Psathyrellaceae, first described in 2011 as a member of genus Coprinellus before being reclassified in 2020. It is characterized by its small, initially ochraceous caps that turn cream and eventually grey with age, and distinctive mitriform (mitre-shaped) spores bearing four knob-like projections. This coprophilous fungus has only been found growing on the dung of alpine chamois (Rupicapra rupicapra) collected at Salati Pass in Aosta, Italy. Its unique combination of habitat preference, granulose veil, and distinctively shaped spores suggests it may occur undetected in similar alpine environments.

...