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The thallus of a crustose lichen is usually only discernible because of the discolouration of the substrate. Some crustose lichens have thalli consisting of scattered or loosely grouped granules. Crustose lichens differ from the leprose lichen by having an upper cortex and algal cells that are located directly beneath the cortex. The thallus of ...
Gyalolechia flavovirescens is a species of saxicolous (rock-dwelling), crustose lichen in the family Teloschistaceae. [2] Taxonomy
[40]: 159 Crustose and squamulose lichens lack a lower cortex, and the medulla is in direct contact with the substrate that the lichen grows on. In crustose areolate lichens, the edges of the areolas peel up from the substrate and appear leafy. In squamulose lichens the part of the lichen thallus that is not attached to the substrate may also ...
Chicitaea species are crustose lichens, meaning they grow as a tight crust that adheres closely to their substrate, typically tree bark. The thallus (main body of the lichen) can range from thin to thick and appears in shades from pale grey-green to olive-grey, with a surface that varies from smooth to warty or bumpy. These lichens reproduce in ...
Lecidella is a genus of crustose lichens in the family Lecanoraceae. Taxonomy. Lecidella was circumscribed by German lichenologist Gustav Wilhelm Körber in 1855. [2]
Xanthoria calcicola is a species of saxicolous and corticolous (rock- and bark-dwelling), crustose lichen in the family Teloschistaceae. [2] Taxonomy
6 Taxonomy. 7 References. ... Phlyctis argena is a species of crustose lichen. [1] ... The lichen is a generalist epiphyte of deciduous trees and is acidophilic.
At that time, the growth form of the lichen thalli was often used in classical lichen taxonomy to segregate groups of species into families, [7] and so in a subsequent (1926) publication, Zahlbruckner introduced the family Caloplacaceae to contain crustose lichens with polarilocular ascospores; this family included the genera Caloplaca ...