A gill, or lamella, is one of the papery ribs under the cap of a mushroom, most often but not always an agaric. As fungi are studied in more detail, several other types of fungi exhibit gills while not members of the Agaricales. it is unclear whether this is a case of convergent evolution (i.e. gill-like structures evolved separately) or evolved once.
Other groups of fungi to bear gills include:
- The genera Russula and Lactarius of the Russulales.
- Several genera in the Boletales, including Paxillus, the spike-caps of Gomphidius and Chroogomphus as well as the velvet roll-rim (Tapinella atrotomentosa) and the False chanterelle (Hygrophoropsis aurantiaca)
The gills are the hymenophore of the mushroom.
Morphologically, gills are classified into the following types:
- Adnate gills icon2.svg
- Adnexed gills icon2.svg
- Decurrent gills icon2.svg
- Emarginate gills icon2.svg
- Seceding gills icon2.svg
- Sinuate gills icon2.svg
- Subdecurrent gills icon2.svg