''Rickenella fibula'' or ''Omphalina fibula'', and commonly known as the orange moss navel is a species of

fungus A fungus (: fungi , , , or ; or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and mold (fungus), molds, as well as the more familiar mushrooms. These organisms are classified as one ...

belonging to the genus '' Rickenella''. The fruit body is orange to yellow and occurs among moss, which is why it is sometimes called moss sentinel. The

cap A cap is a flat headgear, usually with a visor. Caps have crowns that fit very close to the head. They made their first appearance as early as 3200 BC. The origin of the word "cap" comes from the Old French word "chapeau" which means "head co ...

is quite small, with a diameter usually less than .Grand guide encyclopédique des champignons, Jean-Louis Lamaison The stipe is relatively long, about . It has little odor or taste, and is regarded as nonpoisonous. The

spore print 300px, Making a spore print of the mushroom ''Volvariella volvacea'' shown in composite: (photo lower half) mushroom cap laid on white and dark paper; (photo upper half) cap removed after 24 hours showing warm orange ("tussock") color spore print. ...

is white.

Similar species

According to molecular analysis, the species is more closely related to certain

polypore Polypores, also called bracket or shelf fungi, are a morphological group of basidiomycete-like gilled mushrooms and hydnoid fungi that form large fruiting bodies called conks, which are typically woody, circular, shelf- or bracket-shaped, ...

s and

crust fungi The corticioid fungi are a group of fungi in the Basidiomycota typically having effused, smooth basidiocarps (fruit bodies) that are formed on the undersides of dead tree trunks or branches. They are sometimes colloquially called crust fungi or pa ...

than other gilled mushrooms. A similar species is ''

Rickenella swartzii ''Rickenella'' is a genus of brightly colored bryophilous (moss inhabiting) agarics in the Hymenochaetales that have an Omphalina, omphalinoid morphology. They inhabit patches of moss that grow on soil, tree trunks and logs in temperate regions ...

''. It may resemble its relative ''

Loreleia marchantiae ''Loreleia'' is a genus of brightly colored agarics in the Hymenochaetales that have an omphalinoid morphology. They inhabit mosses and or liverworts on soil in temperate regions of the Northern Hemisphere. Phylogenetically related agarics are in ...

'' as well as ''

Mycena acicula ''Mycena acicula'', commonly known as the orange bonnet, or the coral spring Mycena, is a species of fungus in the family Mycenaceae. The mushrooms have small orange-red caps, up to in diameter, held by slender yellowish stems up to long ...

'' and '' Entoloma unicolor''. The stems of '' Xeromphalina'' are darker.

References

External links

* Fungi described in 1784 Repetobasidiaceae Fungus species {{Agaricomycetes-stub