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Flavoplaca Arcisproxima
''Flavoplaca arcisproxima'' is a species of saxicolous lichen, saxicolous (rock-dwelling), crustose lichen in the family Teloschistaceae. It is found primarily in the coastal regions of the Crimean Peninsula and the eastern Mediterranean, particularly in Crete, Greece. Taxonomy The lichen was species description, formally described in 2009 by the lichenologists Jan Vondrák, Jan Říha, Ulf Arup, and Ulrik Søchting. The species is named ''arcisproxima'', meaning "close to arcis", reflecting its phylogenetic and morphology (biology), morphological similarity to ''Caloplaca arcis''. The taxon was transferred to the genus ''Flavoplaca'' in 2013 following a molecular phylogenetics-informed restructuring of the family Teloschistaceae. Description The thallus of ''Flavoplaca arcisproxima'' is coloured yellow to yellow-orange, comprising solitary or rarely aggregated, somewhat . These squamules are flat, smooth, and have margins divided into minute . They are typically 80 to 240&nbs ... [...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] |
Conidia
A conidium ( ; ), sometimes termed an asexual chlamydospore or chlamydoconidium (), is an asexual, non-motile spore of a fungus. The word ''conidium'' comes from the Ancient Greek word for dust, ('). They are also called mitospores due to the way they are generated through the cellular process of mitosis. The two new haploid cells are genetically identical to the haploid parent, and can develop into new organisms if conditions are favorable, and serve in biological dispersal. Asexual reproduction in ascomycetes (the phylum Ascomycota) is by the formation of conidia, which are borne on specialized stalks called conidiophores. The morphology of these specialized conidiophores is often distinctive between species and, before the development of molecular techniques at the end of the 20th century, was widely used for identification of (''e.g.'' ''Metarhizium'') species. The terms microconidia and macroconidia are sometimes used. Conidiogenesis There are two main types of conidium ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
