| Punctelia nashii | |
|---|---|
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Lecanorales |
| Family: | Parmeliaceae |
| Genus: | Punctelia |
| Species: | P. nashii |
| Binomial name | |
| Punctelia nashii Marcelli & Canêz (2011) | |
Punctelia nashii is a species of foliose lichen in the family Parmeliaceae. It is known only from California.
The lichen was described as a new species in 2011 by Brazilian lichenologists Marcelo Marcelli and Luciana da Silva Canêz. The type specimen was collected from the Hastings Natural History Reservation in Monterey County, a biological field station of the University of California. Here it was found growing on blue oak (Quercus douglasii) at an elevation of 560 m (1,840 ft). The specific epithet nashii honors Thomas Hawkes Nash III, "in recognition of his support and for collecting the holotype". [1]
The lichen has a greenish-colored thallus about 10 by 14 cm (3.9 by 5.5 in), comprising irregularly branched lobes measuring 2.5 by 4.0 cm (1.0 by 1.6 in) wide. Soralia on the thallus surface are whitish, with granula soredia. This species does not produce isidia. The pseudocyphellae (one of the uniting features of the genus Punctelia ) are few, and described as "inconspicuous". The undersurface of the thallus ranges from white to yellowish-brown. There are rhizines, both twisted short ones, and longer, sparser ones; both are brown, and always darker than the undersurface. Apothecia are absent. [1]
The main secondary compounds in Punctelia nashii are atranorin and lecanoric acid. The lichen spot tests that give positive reactions in the upper cortex are K+ (yellow), and in the medulla C+ (rose), and KC+ (rose). [1]
Canoparmelia is a genus of lichen-forming fungi in the family Parmeliaceae. The widespread genus contains about 35 species. Canoparmelia, a segregate of the parmelioid lichen genus Pseudoparmelia, was circumscribed by John Elix and Mason Hale in 1986.
Punctelia is a genus of foliose lichens belonging to the large family Parmeliaceae. The genus, which contains about 50 species, was segregated from genus Parmelia in 1982. Characteristics that define Punctelia include the presence of hook-like to thread-like conidia, simple rhizines, and point-like pseudocyphellae. It is this last feature that is alluded to in the vernacular names speckled shield lichens or speckleback lichens.
Punctelia transtasmanica is a species of foliose lichen in the family Parmeliaceae. It is found in Australasia.
Punctelia involuta is a species of foliose lichen in the family Parmeliaceae. Found in Brazil, it was described as a new species in 2010 by Luciana Canêz and Marcelli Marcelo. It is a member of the Punctelia microsticta species group, a set of related Punctelia lichens with a black lower surface and similar morphology. The type specimen of Punctelia involuta was collected in São Luiz do Paraitinga at the Serra do Mar State Park. In an open forest there it was found growing on mosses at the base of a thin, rotting Myrtaceae trunk; the elevation was 975 m (3,200 ft).
Punctelia fimbriata is a species of foliose lichen in the family Parmeliaceae. Found in Brazil, it was formally described as a new species in 2007 by Luciana Canêz and Marcelo Marcelli. The type specimen was collected in the municipality of Vicara in the southern Brazilian state of Rio Grande do Sul. There it was found growing on a tree trunk in an open field on an abandoned farm. It has a greenish-gray thallus measuring up to 10 cm (4 in) in diameter. The specific epithet fimbriata refers to the characteristic phyllidia of this species. Phyllidia are small, corticate, scale-like, dorsiventral structures that develop at the margins or on the upper surface of a lichen thallus. In Punctelia fimbriata, these delicate structures at the margins of the thallus may become lobulate (lobe-like) in age, and develop a "fringed" (fimbriate) appearance.
Punctelia purpurascens is a species of foliose lichen in the family Parmeliaceae. Found in Brazil, it was formally described as a new species in 2007 by lichenologists Marcelo Marcelli and Luciana da Silva Canêz. The type specimen was collected in the municipality of Vicara in the southern Brazilian state of Rio Grande do Sul. There it was found growing on a basaltic rock in an open field. The specific epithet purpurascens refers to the unusual K+ purple reaction of the medulla.
Punctelia osorioi is a species of foliose lichen in the family Parmeliaceae. It is found in Brazil.
Punctelia constantimontium is a species of foliose lichen in the family Parmeliaceae. Its range includes South America, Africa, and Mexico, where it grows on bark and twigs.
Punctelia reddenda is a widely distributed species of foliose lichen in the family Parmeliaceae. It occurs in Africa, Europe, North America, and South America, where it grows on bark and on rock.
Punctelia negata is a little-known species of foliose lichen in the family Parmeliaceae. It is found in South America.
Punctelia riograndensis is a species of foliose lichen in the family Parmeliaceae. Found in Africa and South America, it was formally described as a new species by Norwegian lichenologist Bernt Lynge in 1914, as Parmelia riograndensis. The type specimen was collected in 1892 from Porto Alegre Municipality in Rio Grande do Sul State (Brazil) by Swedish lichenologist Gustav Malme. In 1982, Hildur Krog circumscribed the genus Punctelia to contain Parmelia species with rounded pseudocyphellae, and P. riograndensis was one of the 22 species that she transferred to the new genus.
Punctelia tomentosula is a species of foliose lichen in the family Parmeliaceae. Found in Peru, it was described as a new species in 1999 by Japanese lichenologist Syo Kurokawa.
Punctelia jujensis is a species of foliose lichen in the family Parmeliaceae. It is found in Argentina and Brazil.
Punctelia colombiana is a species of corticolous (bark-dwelling) and foliose (leafy) lichen in the family Parmeliaceae. It is found in South America.
Punctelia subpraesignis is a species of foliose lichen in the family Parmeliaceae. It occurs in Mexico, South America, and East Africa, where it grows on bark and on rocks. Major characteristics of the lichen that distinguish it from other Punctelia species include the C+ and KC+ rose spot tests of the medulla, ascospores that are smaller than 20 μm, and unciform (hooklike) conidia.
Punctelia punctilla is a species of foliose lichen in the family Parmeliaceae. It is found in Africa, South America, and North America, where it grows on bark and on rocks. The main characteristics that distinguish Punctelia punctilla from other species of Punctelia are the presence of isidia on the thallus surface, a pale brown thallus undersurface, and the presence of lecanoric acid in the medulla.
Punctelia hypoleucites, commonly known as the southwestern speckled shield lichen, is a species of foliose (leafy) lichen in the family Parmeliaceae. First formally described by Finnish botanist William Nylander as a species of Parmelia, it was transferred to the genus Punctelia in 1982. The lichen is found in Africa, North America, and South America, where it grows on the bark of both hardwood and coniferous trees. Its greenish-grey thallus is covered with tiny white pseudocyphellae – minute holes in the thallus surface that facilitate gas exchange. Some macroscopic features that help distinguish this species from other related members of the genus include the presence and the structure of the apothecia, the absence of asexual surface propagules, and the light brown color of the thallus undersurface. Chemically, the presence of lecanoric acid in the medulla and atranorin in the cortex help distinguish it from lookalikes.
Punctelia bolliana, the eastern speckled shield lichen, is a species of foliose lichen in the family Parmeliaceae. It is found in North America, with a distribution extending from the Canadian province of Ontario south to the central and northeastern United States and Mexico. It grows on the bark of both deciduous trees and coniferous trees. The combination of characteristics that distinguishes this species from others in genus Punctelia are the absence of the vegetative propagules isidia and soralia, a pale brown lower thallus surface, and the presence of the secondary chemical protolichesterinic acid in the medulla.
Punctelia borrerina is a species of foliose lichen in the family Parmeliaceae. It is found in Mexico and South America.
Punctelia graminicola is a species of foliose (leafy) lichen in the family Parmeliaceae. It grows on rocks, and, less frequently, on bark in North America, South America, and East Africa. It has a blue-grey thallus measuring up to about 15 cm (6 in), covered with tiny pores called pseudocyphellae. Sometimes the lichen forms small lobes that project out from the surface. Fruiting bodies are uncommon in this species; if present, they resemble small cups with a brown internal disc measuring 3–10 mm (0.1–0.4 in) in diameter. A lookalike species, Punctelia hypoleucites, is not readily distinguishable from Punctelia graminicola by appearance or habitat alone; these species can only be reliably differentiated by examining the length of their conidia.