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The IAL has established various committees to address specific aspects of lichenology. The Lichen Terminology Committee, for instance, was responsible for developing an IAL-approved definition of a lichen: "A lichen is an association of a fungus and a photosynthetic symbiont resulting in a stable thallus of specific structure". [3]
With the exception of calicioid lichens, lichen growth forms are based on the appearance of the thallus, which is the vegetative (non-reproductive) part of the lichen. [5] In most species, this form is determined by the lichen's fungal partner, though in a small number, it is instead the alga or cyanobacteria (the lichen's photosynthetic ...
Parmotrema perforatum, commonly known as the perforated ruffle lichen, [3] is a species of foliose lichen in the family Parmeliaceae. [4] The lichen was first formally described as new species in 1787 by Nikolaus Joseph von Jacquin. It was transferred to the genus Parmotrema by Italian lichenologist Abramo Bartolommeo Massalongo in 1860. [5]
Lichens and nitrogen cycling – some lichens (in particular those with cyanobacteria as a photobiont) can fix nitrogen. [26] Lichen biogeography – the study of the current distribution of extant lichens and the reasons for those distributions. [30] Lichen resynthesis – lichens can be artificially "recreated" by combining partners in a lab ...
Basidiolichen mycobionts consist of 172 known species (0.9% of the total number of accepted lichen species) across 15 genera, 5 families, and 5 orders within the class Agaricomycetes in the fungal division Basidiomycota. [1] The majority of described basidiolichen mycobionts belong to the genus Cora, followed by the genera Dictyonema and ...
It has wide distribution, and many common names such as common orange lichen, yellow scale, [2] maritime sunburst lichen and shore lichen. It can be found near the shore on rocks or walls (hence the epithet parietina meaning "on walls"), [ 3 ] and also on inland rocks, walls, or tree bark. [ 4 ]