The "cap" of a fungalfruiting body. The pileus is particularly characteristic of agarics, boletes, and some polypores, tooth fungi, and ascocarps. Other sporocarp types have less clear differentiation between the pileus and the rest of the fruiting body. Sprocarps with a pileus typically have some type of hymenophore (such as lamellae, tubes, or teeth) on the underside of the pileus. Divisions Chytridiomycota Zygomycota Ascomycota Basidiomycota The Fungi (singular: fungus) are a large group of organisms ranked as a kingdom within the Domain Eukaryota. ... Mushroom In fungi, the fruiting body (also known as sporocarp) is a multicellular structure on which spore-producing structures, such as basidia or asci, are borne. ... Families Agarics (also known as gilled mushrooms) are one of the most familiar types of mushrooms. ... Members of the order Boletales (commonly referred to as Boletes) are mushrooms characterized by holding their spores in small pores on the underside of the mushroom, instead of gills (as are found in agarics). ... Polypores are a group of tough, leathery poroid mushrooms similar to boletes, but typically lacking a distinct stalk. ... Tooth fungi (hymenomycetes) are a relatively small group of fungi whose mushroom bears its spores on a hymenium - a layer of mother cells that grow on the outside of tooth-like spines. ... Hymenophore refers to the fruit-bearing structure of a fungal hymenium, or fruit body. ...