Ana Crespo

Melanohalea is a genus of foliose lichens in the family Parmeliaceae. It contains 30 mostly Northern Hemisphere species that grow on bark or on wood. The genus is characterised by the presence of pseudocyphellae (tiny pores that allow for gas exchange), usually on warts or on the tips of isidia, a non-pored epicortex and a medulla containing depsidones or lacking secondary metabolites. Melanohalea was circumscribed in 2004 as a segregate of the morphologically similar genus Melanelia, which was created in 1978 for certain brown Parmelia species. The methods used to estimate the evolutionary

Melanohalea exasperatula, commonly known as the lustrous camouflage lichen or lustrous brown-shield, is a species of corticolous (bark-dwelling) foliose lichen in the family Parmeliaceae. It has a widespread global distribution and is common in both Europe and northern North America. Its thallus can grow up to 5 cm (2 in) in diameter, with marginal lobes up to 5 mm (3⁄16 in) broad. The upper surface is pale olive-green to red-brown, with isidia (propagules of vegetative reproduction) that are unbranched, inflated, and hollow. It can be distinguished from similar species by the shape and

Melanohalea elegantula, commonly known as the elegant camouflage lichen, is a species of foliose lichen in the family Parmeliaceae. It was first described by Alexander Zahlbruckner in 1894 as Parmelia aspidota var. elegantula. Hungarian lichenologist Ödön Szatala promoted it to full species status, as Parmelia elegantula, in 1930. Theodore Esslinger transferred it to the genus Melanelia in 1978. Finally, it was assigned to the newly circumscribed genus Melanohalea in 2004.

Melanelixia is a genus of foliose lichens in the family Parmeliaceae. It contains 15 Northern Hemisphere species that grow on bark or on wood. The genus is characterized by a pored or fenestrate epicortex (a thin homogeneous polysaccharide layer on the surface of the cortex), and the production of lecanoric acid as the primary chemical constituent of the medulla. Melanelixia was circumscribed in 2004 as a segregate of the related genus Melanelia.

Visit the page for more details.

Melanelixia fuliginosa is a species of foliose lichen in the family Parmeliaceae, commonly found growing on siliceous rocks in humid, temperate regions of Europe and possibly parts of Asia. It forms dark brown to blackish rosettes up to 15 cm in diameter with small overlapping lobes that bear numerous tiny, cylindrical outgrowths (isidia) on their surface. The lichen primarily reproduces by vegetative means when these isidia break off and establish new colonies. Originally described by French botanist Jean Étienne Duby in 1830 as a variety of another lichen, it has undergone several taxonomic

Parmelia serrana is a species of foliose lichen in the family Parmeliaceae. It is native to Mediterranean regions, particularly in mountainous areas. It is a member of a complex of similar species centred around the common and widespread Parmelia saxatilis. It can be distinguished from these close relatives by the combination of long, sparsely branched lobes, numerous orbicular soralia, small pseudocyphellae, and sparse, mostly simple rhizines.

Parmelia barrenoae is a species of foliose lichen in the large family Parmeliaceae. It was formally described as a new species in 2005. Before this, it was lumped together as one of several lichens in the Parmelia sulcata group—a species complex of genetically distinct lookalikes. Parmelia barrenoae is widely distributed, occurring in Europe, western North America, Africa, and Asia. The greenish grey to whitish grey leafy thallus of Parmelia barrenoae grows up to 10 cm (4 in) in diameter. Features of the thallus surface include tiny pores for gas exchange, and vegetative propagules called

Melanohalea zopheroa is a species of lichen in the family Parmeliaceae. It was first formally described in 1977 by Ted Esslinger as Parmelia zopheroa. A year later, he transferred it to the new genus Melanelia, which he created to contain the brown Parmeliae species. In 2004, after early molecular phylogenetic evidence showed that Melanelia was not monophyletic, Melanohalea was circumscribed by lichenologists Oscar Blanco, Ana Crespo, Pradeep K. Divakar, Esslinger, David L. Hawksworth and H. Thorsten Lumbsch, and M. zopheroa was transferred to it. The lichen has a disjunct distribution, as it

Melanohalea ushuaiensis is a species of lichen in the family Parmeliaceae. It was first formally described in 1917 by Alexander Zahlbruckner as Parmelia ushuaiensis. Ted Esslinger transferred to the new genus Melanelia in 1978, which he circumscribed to contain the brown parmeliae species. In 2004, it was moved to the newly created genus Melanohalea. It is endemic to South America.

Melanohalea trabeculata is a species of foliose lichen in the family Parmeliaceae. It was first formally described by Finnish lichenologist Teuvo Ahti in 1966 as Parmelia trabeculata. Ted Esslinger transferred the species to the new genus Melanelia in 1978, which he circumscribed to contain the brown parmeliae species. In 2004, it was moved to the newly circumscribed genus Melanohalea. Ahti collected the type in the Cochrane District of Ontario, Canada, on the west end of Martison Lake. There he found it growing on the trunk of a large willow tree on the lake shore. He suggested that it is a

Melanohalea subolivacea, commonly known as the brown-eyed camouflage lichen, is a species of foliose lichen in the family Parmeliaceae.

Melanohalea subelegantula is a species of foliose lichen in the family Parmeliaceae. It grows on tree bark and is characterized by small, finger-like outgrowths that may develop into tiny lobes. The species occurs in western North America and has also been recorded from Tibet.

Melanohalea olivacea, the spotted camouflage lichen or spotted brown shield, is a species of brown foliose lichen in the family Parmeliaceae. It forms rounded, olive-brown to dark brown patches (rosettes) that are typically 5–8 centimetres across on tree bark, particularly on birches in boreal forests and mountain woodlands. The lichen is distinguished by small pale spots called pseudocyphellae scattered across its upper surface and a black lower surface with dark rhizines (root-like attachment threads). Originally described by Carl Linnaeus in 1753 as Lichen olivaceus, the species was moved

Melanohalea halei is a species of foliose lichen in the family Parmeliaceae. The species was first described in 1966 by the Finnish lichenologist Teuvo Ahti from specimens in eastern North America that had previously been misidentified as Melanohalea olivacea. It is distinguished from similar brown foliose lichens by its yellowish- to greenish-brown colour, a thallus that lies closely against the bark and develops tiny side lobes toward the center, and a medulla that reacts K+ (yellow0 and P+ (red) in standard chemical spot tests. The lichen typically forms roundish patches about 10 cm (4 in)

Visit the page for more details.

Xanthoparmelia semiviridis, also known as resurrection lichen is a foliose lichen species in the family Parmeliaceae. Its common name comes from the reaction of a dry sample to moisture. In its dry state it appears like curled-up dry leaf litter on the ground, but after rainfall the lichen will quickly recover, unfurl and become darker in colour. It is found in semi-arid areas across southern Australia and the South Island of New Zealand. The species is in decline in New Zealand because of the loss of habitat resulting from the establishment of dairy farms and vineyards in former indigenous

Parmotrema albinatum is a species of foliose lichen in the family Parmeliaceae that is found in Hawaii. It was originally described in 2001 as Rimelia albinata. Later phylogenetic analysis demonstrated that the genus Rimelia was synonymous with Parmotrema, so this species was transferred to that genus. The lichen is characterized by the sorediate and short-lacinulate (containing glands) thallus with salazinic acid in the medulla and traces of lobaric acid. The upper surface of the thallus is whitish, which probably a result of the thickness of the thick upper cortex.

Montanelia is a genus of lichen-forming fungi belonging to the large family Parmeliaceae. The genus comprises foliose lichens recognised by its short, narrow lobes with flat to slightly convex edges; a smooth, unperforated outer skin (epicortex); shallow, irregular pseudocyphellae—tiny pores—on the upper surface; slender, cylindrical to spindle-shaped asexual spores (conidia); and a white medulla that contains orcinol depsides.

Visit the page for more details.

Melanohalea poeltii is a species of foliose lichen in the family Parmeliaceae. It occurs in Nepal and northeastern India, where it grows on the bark of dwarf shrubs and other woody plants in windswept subalpine scrub.

Melanohalea gomukhensis is a species of corticolous (bark-dwelling) foliose lichen in the family Parmeliaceae. It is found in northern India.

Melanelixia albertana is a species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. First described in 1969 from collections made in Alberta, Canada, it has undergone two taxonomic reclassifications before ultimately being placed in the genus Melanelixia in 2004. The species is characterised by the soralia on the margins of its lobes, a feature that is rare in brown parmelioid lichens. This feature is reflected in its common name, powder-rimmed camouflage lichen. Melanelixia albertana has an unusual Asian-North American disjunct distribution. The widespread presence

Flavoparmelia virensica is a species of corticolous (bark-dwelling), foliose lichen found in Western Australia, newly described in 2010. This species, belonging to the large family Parmeliaceae, is similar in appearance to Flavoparmelia rutidota and F. caperatula, but can be distinguished by its spindle-shaped conidia and significant quantities of virensic acid. The lichen grows on dead and burnt wood as well as the bark of trees from the genera Allocasuarina, Acacia, and Hakea.

Xanthoparmelia vicentei is a species of saxicolous (rock-dwelling) foliose lichen in the family Parmeliaceae. Originally thought to be endemic to western Spain, it was discovered in Luxembourg in 2023, suggesting it may be more widespread in Europe than previously thought. The lichen forms yellowish-green thalli up to 7 cm wide with distinctive finger-like projections in the centre and rolled-back lobes with black tips. Chemical tests show it contains specific lichen products that help identify it from similar species.

Xanthoparmelia vicentei is a species of saxicolous (rock-dwelling) foliose lichen in the family Parmeliaceae. Originally thought to be endemic to western Spain, it was discovered in Luxembourg in 2023, suggesting it may be more widespread in Europe than previously thought. The lichen forms yellowish-green thalli up to 7 cm wide with distinctive finger-like projections in the centre and rolled-back lobes with black tips. Chemical tests show it contains specific lichen products that help identify it from similar species.

Xanthoparmelia subverrucigera is a species of saxicolous (rock-dwelling), foliose lichen in the family Parmeliaceae. It was formally described in 2005 from specimens collected in Embid de la Ribera, Spain. The lichen forms yellowish-green, flat growths measuring 3–5 centimetres across with irregular lobes that adhere closely to the rock surface. Its distinctive features include a wrinkled surface with black-edged margins, small finger-like projections (isidia) that may branch in a coral-like manner, and a brown underside with simple root-like structures. The species has a disjunct

Visit the page for more details.

Visit the page for more details.

Xanthoparmelia pseudepheboides is a species of foliose lichen in the family Parmeliaceae. It has a dark brown, highly branched thallus that grows loosely attached to rock surfaces. The species is found in mountainous areas of the Cape Floristic Region in South Africa.