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The Parmeliaceae is a large and diverse family of Lecanoromycetes. With over 2700 species in 71 genera, it is the largest family of lichen-forming fungi. The most speciose genera in the family are the well-known groups: Xanthoparmelia, Usnea, Parmotrema, and Hypotrachyna.
Charles Christian Plitt was a botanist and lichenologist. Species of lichens that have been named in Charles Plitt's honor are: Pyrenula plittii R.C.Harris, Xanthoparmelia plittii (Gyelnk) Hale, and Pertusaria plittiana Erichsen.
Gassicurtia is a genus of lichenized fungi in the family Caliciaceae.
Hypogymnia is a genus of foliose lichens in the family Parmeliaceae. They are commonly known as tube lichens, bone lichens, or pillow lichens. Most species lack rhizines that are otherwise common in members of the Parmeliaceae, and have swollen lobes that are usually hollow. The lichens usually grow on the bark and wood of coniferous trees.
Canoparmelia is a genus of lichenized fungi in the family Parmeliaceae. The widespread genus contains about 40 species. Canoparmelia, a segregate of the parmelioid lichen genus Pseudoparmelia, was circumscribed by John Elix and Mason Hale in 1986.
Parmelinella is a genus of lichen belonging to the family Parmeliaceae. The genus was circumscribed in 1987 by John Elix and Mason Hale as a segregate of Parmelina, from which it differs in having larger ascospores and containing salazinic acid.
Parmotrema is a genus of lichen belonging to the family Parmeliaceae. It is a large genus, containing an estimated 300 species, with a centre of diversity in subtropical regions of South America and the Pacific Islands.
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 common names speckled shield lichens or speckleback lichens.
Psiloparmelia is a genus of lichen belonging to the family Parmeliaceae. It contains 13 Southern Hemisphere species, most of which are found growing on rocks at high elevations in South America. There are several characteristic features of the genus that are used to distinguish it from the morphologically similar genera, such as Arctoparmelia, Flavoparmelia, and Xanthoparmelia. These include a dark, velvety lower thallus surface that usually lacks rhizines, a negative test for lichenan, and a high concentration of usnic acid and atranorin in the cortex.
Protousnea is a genus of lichenised ascomycetes in the large family Parmeliaceae. It contains three accepted species. Protousnea species have a fruticose growth form. The genus is endemic to southern South America. The genus was circumscribed in 1976 by Hildur Krog as a segregate genus from Usnea.
Phacopsis is a genus of lichenicolous lichens. They grow on parasitically on members of the lichen family Parmeliaceae, of which they are also a member. Phacopsis species appear as partially immersed shiny brown to black apothecia that cause gall-like deformations on the thallus of the host lichen. Phacopsis are distinguished from each other by the shape of their spores, the colour and amyloid staining reaction of the hypothecium, and the identity of their host lichen.
Carolyn Wilson Harris was vice president of the Sullivant Moss Society during 1904–1905 and charge of the Lichen Department from 1901–1905. She also wrote many articles on various lichen genera and species. She was known for being an indefatigable worker, and did much to popularize the study of lichens; her help was always given freely and cheerfully to those who applied to her for assistance in their studies.
Parmotrema arteagum is a species of lichen in the family Parmeliaceae. It was described as new to science in 1982 by Robert Egan. Found in west-central Mexico, the holotype collection was made in Arteaga, after which the lichen is named. It grows on the branches of oak and other deciduous trees in woodlands at elevations between 600–900 metres (2,000–3,000 ft). Parmotrema arteagum is a member of the Parmotrema perforans species complex because of its broad lobes with cilia at the margins, perforations in the apothecia, and lower surfaces with white borders that lack rhizines.
Xanthoparmelia lineola, commonly known as the tight rock-shield, is a foliose lichen species in the genus Xanthoparmelia. It is a common species with a temperate distribution. Found in North America and South Africa, it grows on rocks.
John Walter Thomson Jr. (1913–2009) was a Scottish-born American botanist and lichenologist, sometimes referred to as the "Dean of North American Lichens".
Thomas Hawkes Nash III is an American lichenologist. His research is about the biology and ecology of lichens, and the effects of air pollution on plants and lichens. He is known as an authority on the family Parmeliaceae. During his long career at the Arizona State University, he helped develop the lichen herbarium into a world-class collection with over 100,000 specimens representing more than 5000 species. In 2010, the year of his retirement, he was awarded the Acharius Medal for lifetime achievements in lichenology, and the following year had a Festschrift published in his honor.
Sculptolumina is a genus of corticolous lichens in the family Caliciaceae. The genus was circumscribed by Bernhard Marbach in 2000, with Sculptolumina japonica designated as the type species.
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.
Pleurosticta acetabulum is a species of foliose lichen in the family Parmeliaceae. It is common and widespread throughout Europe, where it grows on tree bark. It has also been recorded in Algeria.
References
- 1 2 3 4 "Egan, Robert (Bob) Shaw". JSTOR Global Plants.
- ↑ "Robert Egan, PhD, Professor Emeritus". Biology, College of Arts and Sciences, University of Nebraska Omaha.
- ↑ "Buellia eganiiBungartz". Consortium of North American Lichen Herbaria, lichenportal.org.
- ↑ "Xanthoparmelia eganiiElix & T.H.Nash". Consortium of North American Lichen Herbaria, lichenportal.org.
- ↑ IPNI. Egan.
