Marasmius sp-IN08 is a decomposer of woodland duff and wood that can be found in association with Oak in the summer. It is closely related to Marasmius sullivantii, though this mushroom is distinct enough to be considered its own species. This one has been found multiple times in an Oak/Hickory woodland at Indian Cave State Park in southeastern Nebraska growing from duff and from wood.

The cap is orange with a darker center, smooth textured, and evenly rounded. The gills are shallow with variable attachment (free, adnexed, notched). The stem is elastic with white basal mycelium. The spore print is white.