Biology:Ramalina geniculatella
| Ramalina geniculatella | |
|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Lecanorales |
| Family: | Ramalinaceae |
| Genus: | Ramalina |
| Species: | R. geniculatella
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| Binomial name | |
| Ramalina geniculatella Aptroot (2008)
| |
Ramalina geniculatella is a species of saxicolous (rock-dwelling), fruticose lichen in the family Ramalinaceae.[1] It is found in the remote tropical island of Saint Helena, where it grows on boulders and cliffs. It was formally described as a new species in 2008 by Dutch lichenologist André Aptroot. The type specimen was collected by the author from Prosperous Bay Plain at an elevation of 330 m (1,080 ft); there, it was found growing on basalt. The initially shrub-like, fruticose thallus of the lichen later becomes pendant, reaching lengths of up to 20 cm (8 in), although typically it is smaller, about 7 cm (2.8 in). The branches of the thallus are about 0.5–1.2 mm wide and about 0.2–0.5 mm thick; they are geniculate (sharply bent) below the apothecia. The species epithet refers to this characteristic feature. Although the branches are greenish-grey, they are covered with whitish pseudocyphellae, which gives the thallus an overall whitish appearance. Thin-layer chromatography shows that the species contains usnic acid, and sometimes boninic acid and protocetraric acids. The photobiont partner is dispersed in irregular groups throughout the medulla.[2]
References
- ↑ "Ramalina geniculatella Aptroot". Species 2000: Naturalis, Leiden, the Netherlands. https://www.catalogueoflife.org/data/taxon/4RBG4.
- ↑ Aptroot, André (2008). "Lichens of St Helena and Ascension Island". Botanical Journal of the Linnean Society 158: 147–171. doi:10.1111/j.1095-8339.2008.00797.x.
External links
- Pictures of Tropical Lichens – Image of species
Wikidata ☰ Q21310664 entry
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