Lecidea

{{short description|Genus of lichenised fungi in the family Lecideaceae}}

{{Automatic taxobox

| image = Lecidea fuscoatra 98284.jpg

| image_caption = Lecidea fuscoatra

| taxon = Lecidea

| authority = Ach. (1803)

| type_species = Lecidea fuscoatra

| type_species_authority = (L.) Ach. (1803)

| subdivision_ranks = Species

| subdivision =

| synonyms_ref =

| synonyms = *Stereonema Kütz. (1836)

• Sporoacania A.Massal. (1855)
• Cladopycnidium H.Magn. (1940)
• Lecideomyces E.A.Thomas ex Cif. & Tomas. (1953)
• Nothoporpidia Hertel (1984)
• Zosterodiscus Hertel (1984)

}}

Lecidea is a genus of crustose lichens with a carbon-black ring or outer margin (exciple) around the fruiting body disc (apothecium), usually (or always) found growing on (saxicolous) or in (endolithic) rock.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014, {{ISBN|978-0-300-19500-2}}{{rp|298}} Lichens that have such a black exciple are called lecideine, meaning "like Lecidea, even if they are not in this genus.{{rp|14}} Members of the genus are commonly called disk lichens or tile lichens.{{rp|298}}