Marasmiineae Aime, Dentinger & Gaya subord. nov.

Name registration: IF551138

Type family: Marasmiaceae Roze ex K uhner €, Bull. mens. Soc. linn. Lyon 49: 76 (1980).

Basidiomata noy only mostly gymnocarpic, agaricoid and rarely gasteroid, often slender in stature, but also with reduced (e.g. astipitate or cyphelloid)

forms. Hyphae monomitic; clamp connections present or absent; cystidia often present. Basidia mostly four spored; basidiospores hyaline.

Representative families: Cyphellaceae Lotsy, Marasmiaceae, Mycenaceae Roze, Omphalotaceae Bresinsky, Physalacriaceae Corner.

Notes: Most members are litter saprobes but some are economically important plant pathogens. A few members are known to reproduce predominantly by conidia (e.g. Mycena citricolor, Moniliophthora roreri) or vegetative rhizomorphs (e.g. Armillaria spp., Rhizomarasmius spp.) and evolution of reduced astipitate and cyphelloid forms has occurred repeatedly. A few orphaned genera (e.g. Baeospora, Hemimycena, and Megacollybia of uncertain familial placement) are referable here. The present study is the first to find support for this clade, although it was recovered without support in Binder et al. (2010).