Английская Википедия:Graphis halonata

Содержание

Текст

Текст

Текст

Текст

Текст

Текст

Текст

Текст

Текст

Graphis halonata is a species of Шаблон:Lichengloss in the family Graphidaceae, first described in 2018. It is found in Brazil. The species is distinguished by its Шаблон:Lichengloss (rock-dwelling) habitat, presence of Шаблон:Lichengloss, and unique Шаблон:Lichengloss characteristics.

Taxonomy

Graphis halonata was formally described by the lichenologists Klaus Kalb and André Aptroot in 2018. The type specimen was collected in the Serra do Espinhaco, specifically Шаблон:Ill, Bocaina, Minas Gerais, Brazil, on a sandstone boulder at an altitude of Шаблон:Convert. The specific epithet halonata refers to the characteristic Шаблон:Lichengloss (halo-like) Шаблон:Lichengloss found in this species.

Description

The thallus of Graphis halonata is Шаблон:Lichengloss, Шаблон:Lichengloss, discontinuous and uneven. It lacks a Шаблон:Lichengloss, is dull and ochraceous white, measuring up to 0.2 mm thick, and is not surrounded by a Шаблон:Lichengloss. The Шаблон:Lichengloss is Шаблон:Lichengloss. Шаблон:Lichengloss are erumpent from the thallus, completely Шаблон:Lichengloss, not striate, wavy linear, irregularly branched and partly divided into separate discs, measuring 0.5–2.5 mm long, about 0.4 mm wide, and approximately 0.3 mm high. The rim is black, and the Шаблон:Lichengloss is lateral and ochraceous white. The Шаблон:Lichengloss is 100–125 μm high and not Шаблон:Lichengloss. Шаблон:Lichengloss, which number eight per Шаблон:Lichengloss, are hyaline, IKI+ (violet), and broadly ellipsoid in shape. These spores are Шаблон:Lichengloss (i.e., divided into Шаблон:Lichengloss or locules by intersecting 3–5 longitudinal and 0–3 transverse septa), measuring 18–26 by 12–15 μm, surrounded by a gelatinous sheath about 5 μm wide, with lumina arranged somewhat spirally. Шаблон:Lichengloss were not observed.

Chemical spot tests show that the thallus and thalline margin of the Шаблон:Lichengloss are UV−, C−, P−, and K+ (yellow turning red). Thin-layer chromatography analysis shows the presence of norstictic and connorstictic acids.

Habitat and distribution

Graphis halonata was found on a free-standing sandstone boulder and at the time of original publication was known only from Brazil.