Biology:Pyxine lilacina
| Pyxine lilacina | |
|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Caliciales |
| Family: | Caliciaceae |
| Genus: | Pyxine |
| Species: | P. lilacina
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| Binomial name | |
| Pyxine lilacina Swinscow & Krog (1975)
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Pyxine lilacina is a rare species of saxicolous (rock-dwelling), foliose lichen in the family Caliciaceae. Found in East Africa, it was scientifically described as a new species in 1975 by lichenologists Dougal Swinscow and Hildur Krog.[1] The lichen has a brownish-grey to lilac-grey thallus that is tightly appressed to its substrate. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] comprising the thallus are flat, and have pseudocyphellae (tiny pores for air exchange) as well as patches of pruina. The thallus underside is black; the internal medulla is white. The lichen contains triterpenoid compounds as well as lichexanthone; the latter substance causes the lichen to fluoresce when lit with a long-wavelength UV light.[2]
Pyxine lilacina is only known to occur in Uganda and Kenya, where it grows on fully or partially exposed rocks, at elevations ranging between 1,100 to 1,700 m (3,600 to 5,600 ft).[2]
References
- ↑ Swinscow, T.D.V.; Krog, H. (1975). "The genus Pyxine in East Africa". Norwegian Journal of Botany 22: 43–68.
- ↑ 2.0 2.1 Swinscow, Thomas Douglas Victor; Krog, Hildur (1988). Macrolichens of East Africa. London: British Museum (Natural History). ISBN 978-0-565-01039-3.
Wikidata ☰ Q21311518 entry
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