Polymeridium albidoreagens

Polymeridium albidoreagens
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Ascomycota
Class:	Dothideomycetes
Order:	Trypetheliales
Family:	Trypetheliaceae
Genus:	Polymeridium
Species:	P. albidoreagens
Binomial name
	Polymeridium albidoreagens; Aptroot, A.A.Menezes & M.Cáceres (2013)

Polymeridium albidoreagens is a species of corticolous (bark-dwelling) lichen in the family Trypetheliaceae.[1] Found in Brazil, it was formally described as a new species in 2013 by lichenologists André Aptroot, Aline Anjos Menezes, and Marcela Cáceres. The type specimen was collected in Rondônia's Porto Velho, Parque Natural Municipal, at an altitude of 100 m (330 ft); other specimens have been reported from Ceará in the Chapada do Araripe. This lichen species is similar to Polymeridium albidum but is characterized by its UV+ (yellow) thallus. The ecorticate, whitish-grey thallus features spherical, erumpent, solitary ascomata with diameters ranging from 0.2 to 0.4 mm and an apical ostiole. The hamathecium is not inspersed, and the ascospores number 8 per ascus, contain 3 septa, and measure 20–23 by 6–8 μm without ornamentation. The lichen's chemistry includes the presence of lichexanthone.[2]

References

"Polymeridium albidoreagens Aptroot, A.A. Menezes & M. Cáceres". Catalogue of Life. Species 2000: Leiden, the Netherlands. Retrieved 30 March 2023.
Aptroot, A.; Cáceres, M.E.S. (2014). "A refined species concept in the tropical microlichen genus Polymeridium (Trypetheliaceae) doubles the number of known species, with a world key to species". Nova Hedwigia. 98: 1–29.

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[CoL-1] "Polymeridium albidoreagens Aptroot, A.A. Menezes & M. Cáceres". Catalogue of Life. Species 2000: Leiden, the Netherlands. Retrieved 30 March 2023.

[Aptroot_&_Cáceres_2014-2] Aptroot, A.; Cáceres, M.E.S. (2014). "A refined species concept in the tropical microlichen genus Polymeridium (Trypetheliaceae) doubles the number of known species, with a world key to species". Nova Hedwigia. 98: 1–29.