| Xanthoparmelia ajoensis | |
|---|---|
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Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Lecanorales |
| Family: | Parmeliaceae |
| Genus: | Xanthoparmelia |
| Species: | X. ajoensis |
| Binomial name | |
| Xanthoparmelia ajoensis (T.H.Nash) Egan (1975) | |
| Synonyms | |
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Xanthoparmelia ajoensis is a foliose lichen that belongs to the genus Xanthoparmelia. The lichen is uncommon and is listed as vulnerable by the Nature Conservatory. [1]
Xanthoparmelia ajoensis grows to around 2–6 cm in diameter with irregularly lobate lobes which are approximately 1–3 mm wide. The upper surface of the lichen is yellow-green on the surface and pale brown to brown on the underside. [2] [3]
Xanthoparmelia ajoensis is found in the North American southwest including the US states of Arizona, [4] California, [5] Colorado, and New Mexico and the Mexican states of Sinaloa and Sonora. [6]
Xanthoparmelia ajoensis has been recorded as containing usnic acid and 3-α-hydroxybarbatic acids. [3] [6]
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.
Sarcogyne is a genus of crustose lichens in the family Acarosporaceae. It was circumscribed by German botanist Julius von Flotow in 1850. A proposal has been put forth in 2021 to assign Sarcogyne clavus as the type species of the genus, "as it represents the original concept of Sarcogyne as having melanized lecideine apothecia without algae in the margin".
Xanthoparmelia is a genus of foliose lichens in the family Parmeliaceae. This genus of lichen is commonly found in the United States, South America, southern Africa, Europe, Australia, and New Zealand.
The Lecideaceae are a family of lichen-forming fungi in the order Lecideales. It contains about 30 genera and roughly 250 species. A major distinguishing characteristic of the family is the lecanoroid form of the fruiting bodies: typically circular, dark, and without a thalline margin. Most species in the family are lichenised with green algae, although a few species, scattered amongst several genera, are lichenicolous—they live on other lichens. Lecideaceae lichens tend to grow on rocks, wood, and soil. Several Lecideaceae species accelerate the weathering of rock surfaces, a process known as pedogenesis, by extending their hyphae into cracks and expelling rock flakes. This contributes to significantly faster weathering rates in certain environments, impacts various materials from natural rocks to man-made Sekishu roof tiles, and involves key biomolecules identified for survival and biodeterioration, including compounds to withstand intense ultraviolet radiation.
Xanthoparmelia maricopensis, the Maricopa rock-shield, is a 2–6 cm (0.8–2.4 in) wide, yellow-green foliose lichen in the Parmeliaceae family. It grows on igneous rock in southwestern North American deserts.
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.
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.
Constipatic acid is a fatty acid found in several lichen species. It was isolated, identified, and named by Douglas Chester and John Alan Elix in a 1979 publication. The compound was extracted from the Australian leafy lichen called Xanthoparmelia constipata, which was collected on schist boulders west of Springton, South Australia. The related compounds protoconstipatic acid and dehydroconstipatic acid were also reported concurrently. Syo Kurokawa and Rex Filson had previously detected the compounds using thin-layer chromatography when they formally described the lichen as a new species in 1975, but had not characterised them chemically.
Salazinic acid is a depsidone with a lactone ring. It is found in some lichens, and is especially prevalent in Parmotrema and Bulbothrix, where its presence or absence is often used to help classify species in those genera.
Lichen products, also known as lichen substances, are organic compounds produced by a lichen. Specifically, they are secondary metabolites. Lichen products are represented in several different chemical classes, including terpenoids, orcinol derivatives, chromones, xanthones, depsides, and depsidones. Over 800 lichen products of known chemical structure have been reported in the scientific literature, and most of these compounds are exclusively found in lichens. Examples of lichen products include usnic acid, atranorin, lichexanthone, salazinic acid, and isolichenan, an α-glucan. Many lichen products have biological activity, and research into these effects is ongoing.
Xanthoparmelia cumberlandia is a lichen which belongs to the Xanthoparmelia genus. It is also known as a member of the rockfrong lichens due to its coloration.
Xanthoparmelia californica is a lichen which belongs to the Xanthoparmelia genus. The lichen is uncommon and is listed as imperiled by the Nature Conservatory.
Xanthoparmelia subramigera is a lichen which belongs to the Xanthoparmelia genus.
Xanthoparmelia plittii is a lichen which belongs to the Xanthoparmelia genus.
Xanthoparmelia angustiphylla is a foliose lichen that belongs to the genus Xanthoparmelia.
Xanthoparmelia montanensis is a lichen which belongs to the Xanthoparmelia genus. It is also known as the Montana Rock-shield Lichen.
Xanthoparmelia ahtii is a rock shield lichen that belongs to the family Parmeliaceae. One previous name for this species was Neofuscelia ahtii. The lichen is uncommon and is listed as imperiled by the Nature Conservatory.
Xanthoparmelia schmidtii is a lichen which belongs to the Xanthoparmelia genus. The lichen is uncommon and is listed as endangered by the Nature Conservatory.
Toby Spribille is a lichenologist, specialising in evolution and taxonomy. He identified the presence of yeast cells as an additional fungal component of some lichens. He works at University of Alberta and is the Canada Research Chair in Symbiosis.
Cliostomum spribillei is a species of corticolous (bark-dwelling) crustose lichen in the family Ramalinaceae. It is found in the American Pacific Northwest and western Canada, where it grows on coniferous trees in old-growth forests. The lichen was formally described as a new species in 2016 by the lichenologists Trevor Goward and Tor Tønsberg. The type specimen was collected by the first author near the headwaters of Grouse Creek at an altitude of 1,750 m (5,740 ft), where it was found growing on the branches and trunks of Abies lasiocarpa in an old-growth forest. The species epithet spribillei honors lichenologist Toby Spribille "for his many significant contributions to our knowledge of northwest North American lichens".
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