Английская Википедия:Enterographa aldabrensis
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Enterographa aldabrensis is a species of corticolous (bark-dwelling), crustose lichen in the family Roccellaceae.[1] It is only known to occur in Aldabra in the Seychelles.
Taxonomy
Enterographa aldabrensis was formally described as a new species by the Dutch lichenologist Laurens Benjamin Sparrius. The species is characterised by its Шаблон:Lichengloss that contain three septa and absence of norstictic acid, distinguishing it from closely related species such as Enterographa subserialis and E. elixii.[2]
Description
The lichen has a Шаблон:Lichengloss up to Шаблон:Convert in diameter, Шаблон:Lichengloss to Шаблон:Lichengloss, white to cream-coloured, and water-repellent, measuring 50–100 μm thick. It contains Trentepohlia ( a genus of green algae) as its Шаблон:Lichengloss partner. The Шаблон:Lichengloss is very thin, grey or absent. The upper algae-free medulla is about 10 μm thick, consisting of densely interwoven hyphae. The medulla is cream-coloured with abundant Шаблон:Lichengloss measuring 10–20 μm in diameter.[2]
Ascomata are Шаблон:Lichengloss or slightly comma-shaped, Шаблон:Lichengloss, measuring 0.05 by 0.05–0.10 mm, with a Шаблон:Lichengloss that is dark brown to black and Шаблон:Lichengloss. The thalline margin is approximately 0.1 mm wide and forms linear, frequently branched Шаблон:Lichengloss, which may become mixed with neighbouring pseudostromata. The Шаблон:Lichengloss is 5–10 μm wide, hyaline (translucent) in section but often brown near the Шаблон:Lichengloss. The Шаблон:Lichengloss is hyaline, 10–30 μm tall, and the hymenium is hyaline, 80–100 μm tall.[2]
The Шаблон:Lichengloss is 10–12 μm tall, orange-brown, with crystals of about 0.5 μm in diameter, and reacts K+ (green). Шаблон:Lichengloss are cylindrical, 60–80 by 12–20 µm, and have eight spores. Шаблон:Lichengloss are Шаблон:Lichengloss, somewhat constricted around the middle, measuring 13–18 by 4.0–5.5 μm, 3-septate, with a perispore less than 2.0 μm thick. Шаблон:Lichengloss appear as dark brown dots along the thallus margin, and Шаблон:Lichengloss are rod-shaped, measuring 0.7 by 2.0–2.5 μm.[2]
Chemistry
The thallus of Enterographa aldabrensis reacts C−, K+ (yellowish), P+ (yellow), UV+ (cream-coloured) to standard chemical spot tests. Thin-layer chromatography reveals the presence of psoromic acid. The Шаблон:Lichengloss and Шаблон:Lichengloss show an Шаблон:Lichengloss reaction, I+ and KI+ (dark blue), while the Шаблон:Lichengloss, Шаблон:Lichengloss, and Шаблон:Lichengloss react I+ (red) and KI+ (dark blue).[2]
Habitat and distribution
This species is known only from the type locality in Aldabra, Seychelles. It grows on the bark of coastal trees and shrubs.[2]
Similar species
Enterographa aldabrensis is recognised by its thin, pale thallus with black Шаблон:Lichengloss, immersed ascomata arranged in lines. It is morphologically and chemically similar to E. subserialis but differs in having 3-septate Шаблон:Lichengloss and a K+ (green) Шаблон:Lichengloss. It lacks trace amounts of norstictic acid found in the Шаблон:Lichengloss of similar species. This species is differentiated from E. compunctula, which also has 3-septate Шаблон:Lichengloss, by its chemical composition and the shape of its Шаблон:Lichengloss.[2]
References
