Microstoma protractum is a species of cup fungus in the family Sarcoscyphaceae. It was first described as a species of Peziza by Elias Magnus Fries in 1851. American mycologist Bessie B. Kanouse assigned it its current name in 1948. The fungus is found in Europe and North America, where it grows as a saprophyte on partially buried sticks and roots. References External links Sarcoscyphaceae Fungi described in 1851 Fungi of Europe Fungi of North America Taxa named by Elias Magnus Fries