Coprinellus truncorum
Encyclopedia
Coprinellus truncorum is a species of mushroom
Mushroom
A mushroom is the fleshy, spore-bearing fruiting body of a fungus, typically produced above ground on soil or on its food source. The standard for the name "mushroom" is the cultivated white button mushroom, Agaricus bisporus; hence the word "mushroom" is most often applied to those fungi that...

 in the Psathyrellaceae
Psathyrellaceae
The Psathyrellaceae are a family of dark-spored agarics that generally have rather soft, fragile fruiting bodies, and are characterized by black or dark brown, rarely reddish, or even pastel colored spore prints. About 50% of the species produce fruiting bodies that dissolve into ink-like ooze...

 family. Part of the cluster of mushroom morphologically related to Coprinellus micaceus
Coprinellus micaceus
Coprinellus micaceus is a common species of fungus in the family Psathyrellaceae with a cosmopolitan distribution. The fruit bodies of the saprobe typically grow in clusters on or near rotting hardwood tree stumps or underground tree roots...

, this species can be distinguished from C. micaceus by a smooth, rather than pruinose (powdery) stem, and by having more elliptical spore
Spore
In biology, a spore is a reproductive structure that is adapted for dispersal and surviving for extended periods of time in unfavorable conditions. Spores form part of the life cycles of many bacteria, plants, algae, fungi and some protozoa. According to scientist Dr...

s. Although not conclusively proven yet, this species may be conspecific with C. micaeus.
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