Английская Википедия:Cryptoschizotrema
Шаблон:Short description Шаблон:Use British English Шаблон:Automatic taxobox
Cryptoschizotrema is a genus of lichen-forming fungi in the family Graphidaceae. It has two species.[1][2] The genus was circumscribed in 2019 by lichenologists André Aptroot, Robert Lücking, and Marcela Cáceres. The genus name alludes to the similarity in anatomy with Schizotrema species. This resemblance is due to the partially Шаблон:Lichengloss, concentrically layered, and fissured Шаблон:Lichengloss, which gives the impression that the Schizotrema-like excipulum is concealed beneath a protective layer. The type species was originally described by William Nylander in 1867, as a species of Thelotrema.[3]
Description
The ascomata of Cryptoschizotrema lichens are immersed-Шаблон:Lichengloss and rounded, with the Шаблон:Lichengloss concealed beneath a narrow pore. The Шаблон:Lichengloss is hidden by a whitish thalline layer, and when abraded, it reveals brown to black fissured Шаблон:Lichengloss that form concentric layers in older specimens. Notably, a Шаблон:Lichengloss is absent in this genus. The Шаблон:Lichengloss of Cryptoschizotrema is Шаблон:Lichengloss, displaying a dark brown colour that may partially Шаблон:Lichengloss towards its apex. As the ascomata mature, the excipulum develops distinct layers or striations. Шаблон:Lichengloss, however, are not present.[3]
The hymenium of this lichen is transparent, featuring unbranched Шаблон:Lichengloss. Шаблон:Lichengloss are typically found in quantities of one to two, though occasionally up to four per ascus. These ascospores are Шаблон:Lichengloss, measuring up to 100 by 30 μm, and have an oblong to ellipsoid shape. The Шаблон:Lichengloss, with relatively thin walls and septa, along with angular Шаблон:Lichengloss, contribute to the ascospores' colourless appearance. Additionally, they are I-negative, indicating their non-amyloid nature. The secondary chemistry of the genus is characterized by the presence of psoromic acid, which causes the thallus to display a P+ (yellow) reaction with standard chemical spot tests.[3]
Species
Species in this genus occur in Central and South America.
References
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- Английская Википедия
- Graphidaceae
- Lichen genera
- Graphidales genera
- Taxa described in 2019
- Taxa named by André Aptroot
- Taxa named by Marcela Cáceres
- Taxa named by Robert Lücking
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- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
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