Fungi Temporal range: Lower Devonian–Present 410 mya–present; earliest=Vendian
Clockwise from top left: Amanita muscaria, a basidiomycete; Sarcoscypha coccinea, an ascomycete; bread covered in mold; a chytrid; an Aspergillus conidiophore.
Scientific classification
(unranked):	Opisthokonta
(unranked):	Holomycota
(unranked):	Zoosporia
Kingdom:	Fungi
Subkingdoms/Phyla/Subphyla
Blastocladiomycota Chytridiomycota Glomeromycota Microsporidia Neocallimastigomycota Dikarya (inc. Deuteromycota) Ascomycota Basidiomycota Subphyla incertae sedis Entomophthoromycotina Kickxellomycotina Mucoromycotina Zoopagomycotina

The coral fungus Clavaria zollingeri in Babcock State Park, West Virginia, USA.

Fungal hyphae with septa

A fungus (plural: fungi) is a kind of living organism: yeasts, moulds and mushrooms that exist as a single filamentous or multicellular body. The filament is known as hyphae multinuclear with cell wall containing chitin or cellulose or both, others are parasitic saprophytic on other organisms and reproduce sexually and asexually.

The fungi are a separate kingdom of living things, different from animals and plants.

Fungi have cells with nuclei. Their cell walls contain chitin, unlike the cell walls of plants, which contain cellulose. These and other differences show that the fungi form a single group of related organisms, called the Eumycota or Eumycetes. They share a common ancestor and are a monophyletic group.