Biology:Polyblastidium hypoleucum
| Polyblastidium hypoleucum | |
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Scientific classification 
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| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Caliciales |
| Family: | Physciaceae |
| Genus: | Polyblastidium |
| Species: | P. hypoleucum
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| Binomial name | |
| Polyblastidium hypoleucum (Ach.) Kalb (2015)
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| Synonyms[1] | |
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List
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Polyblastidium hypoleucum, the cupped fringe lichen, is a widely distributed species of corticolous (bark-dwelling), foliose lichen in the family Physciaceae.[2]
Taxonomy
The species was first formally described by the Swedish lichenologist Erik Acharius in 1814, who considered it a form of what was then known as Parmelia speciosa.[3] Vittore Benedetto Antonio Trevisan de Saint-Léon reclassified it in genus Heterodermia in 1868.[4] It was transferred to the newly circumscribed genus Polyblastidium in 2015 by Klaus Kalb.[5]
Description
Polyblastidium hypoleuca is a foliose (leaf-like) lichen with a grey to blue-grey upper surface. The thallus lacks vegetative propagules such as soredia and isidia, and is instead composed of long, flat [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] that spread outward and often develop short secondary lobes in the central parts of the thallus. The internal medulla is white. The underside is pale and lacks a distinct [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]], while the rhizines are dark, [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] (branching like a bottlebrush), and concentrated along the lobe margins. Apothecia (fruiting bodies) are common, borne on the upper surface ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]), and frequently have margins that break up into small [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]].[6]
Chemically, the species contains atranorin, zeorin, a terpenoid compound and probably leucotylin. In standard spot tests the cortex reacts K+ (yellow) and P+ (yellowish), but is C–, KC– and UV–; the medulla is K–, C–, KC–, P– and UV–.[6]
In North America, it is commonly known as the "cupped fringe lichen".[7][8]
Habitat and distribution
Polyblastidium hypoleuca is a widely distributed lichen, having been recorded from all continents except for Antarctica. It is most often found in humid habitats growing on deciduous trees.[8]
References
- ↑ "GSD Species Synonymy. Current Name: Polyblastidium hypoleucum (Ach.) Kalb, in Mongkolsuk, Meesim, Poengsungnoen, Buaruang, Schumm & Kalb, Phytotaxa 235(1): 42 (2015)". Species Fungorum. https://www.speciesfungorum.org/GSD/GSDspecies.asp?RecordID=813843.
- ↑ "Polyblastidium hypoleucum (Ach.) Kalb". Species 2000: Leiden, the Netherlands. https://www.catalogueoflife.org/data/taxon/4L2CG.
- ↑ Acharius, E. (1814) (in la). Synopsis Methodica Lichenum. Lundin: Svanborg and Company. p. 211.
- ↑ Trevisan, V. (1868). "Sul genere Dimelaena di Norman" (in it). Atti della Società Italiana di Scienze Naturali 11: 604–630 [624]. https://www.biodiversitylibrary.org/page/39827545.
- ↑ Mongkolsuk, Pachara; Meesim, Sanya; Poengsungnoen, Vasun; Buaruang, Kawinnat; Schumm, Felix; Kalb, Klaus (2015). "The lichen family Physciaceae in Thailand—II. Contributions to the genus Heterodermia sensu lato". Phytotaxa 235 (1): 1–66. doi:10.11646/phytotaxa.235.1.1.
- ↑ 6.0 6.1 Lendemer, J. (2009). "A synopsis of the lichen genus Heterodermia (Physciaceae, lichenized Ascomycota) in eastern North America". Opuscula Philolichenum 6: 1–36 [19]. https://www.researchgate.net/publication/344269912.
- ↑ Brodo, Irwin M.; Sharnoff, Sylvia Duran; Sharnoff, Stephen (2001). Lichens of North America. New Haven: Yale University Press. p. 338. ISBN 978-0-300-08249-4.
- ↑ 8.0 8.1 McMullin, R. Troy (2023). Lichens. The Macrolichens of Ontario and the Great Lakes Region of the United States. Firefly Books. p. 231. ISBN 978-0-228-10369-1.
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