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Psilolechia Torii
''Psilolechia'' is a genus of four species of crustose lichens. It is the only member of Psilolechiaceae, a family that was created in 2014 to contain this genus. Taxonomy The genus ''Psilolechia'' was established by Abramo Bartolommeo Massalongo in 1860. Formerly classified in the family Pilocarpaceae, molecular phylogenetic analysis showed that ''Psilolechia'' represented a distinct lineage that deserved placement at the familial level, the Psilolechiaceae, which was formally circumscribed in 2014. This arrangement was accepted in later large-scale updates of fungal classification. Psilolechiaceae is in the order Lecanorales, in the suborder Sphaerophorineae, which also includes the families Pilocarpaceae, Psoraceae, and Ramalinaceae. Description Psilolechiaceae is a monogeneric family of crustose lichens with effuse, ecorticate (lacking a cortex), leprose thalli formed by goniocysts (aggregations of photobiont cells surrounded by short-celled hyphae) containing ''Trebouxia' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psilolechia Lucida
''Psilolechia lucida'' is a species of saxicolous lichen in the family Psilolechiaceae. It is widely distributed through the world, where it grows on natural and artificial rocky substrates in the shade, often in sheltered underhangs. It forms a greenish crust on the surface of its substrate. Taxonomy It was originally described by lichenologist Erik Acharius in 1799. Maurice Choisy placed it in the genus ''Psilolechia'' in 1949. There are known to be two chemical races of ''P. lucida''. The first, which is known all over the world, contains rhizocarpic acid as a major secondary substance as well as some unknown substances. The second, reported only from Australia and New Zealand, has both rhizocarpic acid and zeorin. Description ''Psilolechia lucida'' forms a sulphur-yellow to yellowish green crust, although the colour is greener when the surface is wet. The crust comprises powdery soredia that can be thin or thick, and sometimes divided into irregular areoles. The apot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |