| Enterographa aldabrensis | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Arthoniomycetes |
| Order: | Arthoniales |
| Family: | Roccellaceae |
| Genus: | Enterographa |
| Species: | E. aldabrensis |
| Binomial name | |
| Enterographa aldabrensis Sparrius (2009) | |
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.
Enterographa aldabrensis was formally described as a new species by the Dutch lichenologist Laurens Benjamin Sparrius. The species is characterised by its ascospores that contain three septa and absence of norstictic acid, distinguishing it from closely related species such as Enterographa subserialis and E. elixii . [2]
The lichen has a thallus up to 5 cm (2 in) in diameter, smooth to areolate , white to cream-coloured, and water-repellent, measuring 50–100 μm thick. It contains Trentepohlia ( a genus of green algae) as its photobiont partner. The prothallus 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 oxalate crystals measuring 10–20 μm in diameter. [2]
Ascomata are punctiform or slightly comma-shaped, perithecioid , measuring 0.05 by 0.05–0.10 mm, with a disc that is dark brown to black and epruinose . The thalline margin is approximately 0.1 mm wide and forms linear, frequently branched pseudostromata , which may become mixed with neighbouring pseudostromata. The excipulum is 5–10 μm wide, hyaline (translucent) in section but often brown near the epithecium . The hypothecium is hyaline, 10–30 μm tall, and the hymenium is hyaline, 80–100 μm tall. [2]
The epithecium is 10–12 μm tall, orange-brown, with crystals of about 0.5 μm in diameter, and reacts K+ (green). Asci are cylindrical, 60–80 by 12–20 μm, and have eight spores. Ascospores are ellipsoid , 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. Conidiomata appear as dark brown dots along the thallus margin, and conidia are rod-shaped, measuring 0.7 by 2.0–2.5 μm. [2]
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 epithecium and excipulum show an amyloid reaction, I+ and KI+ (dark blue), while the hymenium , asci , and hypothecium react I+ (red) and KI+ (dark blue). [2]
This species is known only from the type locality in Aldabra, Seychelles. It grows on the bark of coastal trees and shrubs. [2]
Enterographa aldabrensis is recognised by its thin, pale thallus with black punctiform , immersed ascomata arranged in lines. It is morphologically and chemically similar to E. subserialis but differs in having 3-septate ascospores and a K+ (green) epithecium . It lacks trace amounts of norstictic acid found in the hypothecium of similar species. This species is differentiated from E. compunctula , which also has 3-septate ascospores , by its chemical composition and the shape of its pseudostromata . [2]
Lithoglypha is a fungal genus in the family Acarosporaceae. It is monotypic, containing the single species Lithoglypha aggregata, a saxicolous (rock-dwelling), crustose lichen found in South Africa.
Austrographa is a genus of lichen-forming fungi in the family Roccellaceae. It has three species. The genus was circumscribed in 2013 by lichenologists Laurens Sparrius, John Elix, and Alan Archer, with Austrographa kurriminensis assigned as the type species. The genus had been published invalidly on two separate occasions. All three species in the genus were found in a mangrove stand in Queensland, Australia. The genus was discovered in Australia, and the name Austrographa reflects this.
Fissurina capsulata is a species of corticolous (bark-dwelling) script lichen in the family Graphidaceae. Found in India, it was formally described as a new species in 2007 by Urmila Makhija and Bharati Adawadkar. The lichen is native to Kodaikanal, Tamil Nadu, where it was first identified near Daisy Bank in 1975.
Fissurina coarctata is a species of script lichen in the family Graphidaceae. It is found in India, where it grows in tropical rainforests and moist deciduous forests. This corticolous (bark-dwelling) lichen is primarily found on exposed tree trunks along roadsides. Its thallus has a yellowish-brown to olive-green colour and has a thick, verrucose texture. The species was formally described as new to science in 2007 by Urmila Makhija and Bharati Adawadkar.
Enterographa incognita is a little-known species of crustose lichen in the family Roccellaceae. Found in Southeast Thailand, it is characterised by its sorediate features and its distinct ascomata and ascospores. This lichen, only known to occur in its type locality, thrives on large trunks in a mangrove environment.
Enterographa kinabaluensis is a species of corticolous (bark-dwelling) crustose lichen in the family Ramalinaceae. Found in coastal rainforests on the island of Borneo, it was described as a new species in 2020. Characterised by its white thallus, punctiform (dot-like) soralia and norstictic acid content, this lichen is readily recognisable when fertile.
Fulvophyton is a genus of lichen-forming fungi in the family Roccellographaceae. It has 11 species. Fulvophyton is characterised by its crust-like thallus, which is often pale yellowish-brown in colour. This genus features a photobiont from the green algal genus Trentepohlia and exhibits a unique arrangement of reproductive structures.
Fulvophyton serusiauxii is a species of saxicolous (rock-dwelling) crustose lichen in the family Roccellographaceae. It has a distinct cream-coloured, areolate thallus and specific chemical characteristics. This lichen is only known from its type locality in Mexico where it grows on granite boulders near the Pacific Ocean shore.
Cratiria sorediata is a species of corticolous (bark-dwelling), crustose lichen in the family Caliciaceae. It was first described as a new species in 2009. The type specimen was collected from Aldabra in the Seychelles.
Malmidea allobakeri is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Venezuela.
Malmidea allopapillosa is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Venezuela.
Malmidea atlanticoides is a little-known species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Brazil.
Malmidea hechicerae is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Venezuela.
Malmidea hernandeziana is a little-known species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Venezuela. The distinctive features of this species include a thallus with coralloid-like outgrowths, light-coloured fruiting bodies (ascomata) with a specialised structural layer, relatively large spores that tend to have slightly thickened walls at their ends, and the absence of specific lichen products typically found in other species of the genus. This combination of characteristics sets Malmidea hernandeziana apart from other species in the genus Malmidea.
Malmidea subcinerea is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Venezuela. The lichen has a smooth, dull thallus varying in colour from grey to olive, with a white internal medulla. It has sessile, rounded apothecia with light beige to greyish-brown discs.
Malmidea volcaniana is a species of corticolous (bark-dwelling), crustose lichen in the family Malmideaceae. It is found in Venezuela. A major characteristic of the species is the coralloid (coral-shaped) clumps of isidia-like outgrowths on the thallus surface.
Enterographa dokdoensis is a species of saxicolous (rock-dwelling), script lichen in the family Roccellaceae. It occurs in South Korea. The lichen has a thallus that can cover areas up to 5–10 cm in diameter, with a smooth to roughened texture and a green-grey to mauve colour.
Byssoloma xanthonicum is a species of corticolous (bark-dwelling), crustose lichen in the family Pilocarpaceae. It is found in New Caledonia.
Byssotrema is a monotypic fungal genus in the subfamily Graphidoideae of the family Graphidaceae. It contains the single species Byssotrema mirabile, a little-known corticolous (bark-dwelling), crustose lichen found only in Brazil.
Corticorygma is a monotypic fungal genus in the subfamily Graphidoideae of the family Graphidaceae. It contains a single species, the corticolous (bark-dwelling) crustose lichen Corticorygma stellatum. This script lichen is found in the shaded understory of rainforests in the Brazilian states of Rondônia and Paraná.