|
Dirina Pacifica
''Dirina pacifica'' is a species of saxicolous lichen, saxicolous (rock-dwelling), crustose lichen in the family Roccellaceae. It is found in both Hawaii and the Galápagos Islands, where it grows in coastal outcrops. The lichen was species description, formally described as a new species in 2013 by Anders Tehler and Damien Ertz. The type (biology), type specimen was collected from North Koolaupoko, Hawaii, Koolaupoko (Oahu, Hawaii). The botanical name, species epithet refers to the Pacific Ocean. It has a creamy white to greyish or brownish thallus (0.1–0.3 mm thick) lacking , and a chalk-like medulla (lichenology), medulla. Its ascomata have a circular outline up to 1.5 mm in diameter, with a whitish-grey . Its ascospores measure 19–27 by 4–5 micrometre, μm. ''Dirina pacifica'' contains the lichen products erythrin, lecanoric acid, and sometimes three unidentified substances named "C", "F", and "G". References Dirina, pacifica Lichen species Lichen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saxicolous Lichen
A saxicolous lichen is a lichen that grows on rock. The prefix "sax" from the Latin means "rock" or "stone". Characteristics Saxicolous lichens exhibit very slow growth rates. They may develop on rock substrates for long periods of time, given the absence of external disturbances. The importance of the mineral composition of the rock substrate, as well as the elemental geochemistry Geochemistry is the science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems such as the Earth's crust and its oceans. The realm of geochemistry extends beyond the Earth, encompassing the e ... is also important to the distribution of saxicolous lichens, but the relationship between the substrate influence on lichens, either chemical or textural, is still obscure. Communities of saxicolous lichens are often species-rich in terms of number. References Lichenology {{lichen-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |